日本成人片在线_久久免费精品视频_国产午夜精品久久久久久免费视_校花撩起jk露出白色内裤国产精品_av影片免费在线观看_国产小视频在线看_最新av免费在线观看_99久久99久久精品国产片_欧美成人猛片aaaaaaa_蜜桃免费网站一区二区三区

When Geoff Marcy was 14, his parents bought him a telescope. Every night, he would go onto the roof outside his window to see the wonders of the sky.
“What excited me most was whether there were planets in other solar systems where life might exist,” he says. “I decided to try to find planets orbiting other stars like our Sun.”
And he did. “My fellow researcher, Paul Butler, and I found our first planet in 1995,” Dr. Marcy says. “We worked for ten years without finding anything! But we stuck with it and our patience paid off.”
Since then, the two scientists have discovered 65 of the more than 100 planets found orbiting other stars. Dr. Marcy and Dr. Butler also spotted the first “family” of three planets. In June 2002 they announced another discovery: a Jupiter-like planet orbiting star 55Cancri.
At first, the two researchers found only planets that orbit close to stars. Recently, the scientists found planets farther out. The planet orbiting 55Cancri is a major breakthrough: it is the first sighting of a large gas planet about same distance from the star as Jupiter is from the Sun.
Why is this important ? Scientists think that life on Earth may exist because of two special features in our solar system. The first is Jupiter.
“Because it’s so big, Jupiter pulls comets and asteroids(小行星), or they all come and hit the Earth.” Dr. Marcy explains. “Without Jupiter , life on Earth would likely have been destroyed.”
A second feature is that Earth is a rocky planet where liquid water, which is necessary for life , can exist. Unlike gas planets, rocky planets like Earth have surfaces where water can gather in pools and seas, which may support life. A huge space exists between the Jupiter-like planet and two other planets that lie close to 55Cancri. Is there an Earth-like planet in the space, too small for us to notice? If so, says Dr. Marcy, “We would have two striking similarities to our solar system: a Jupiter-like planet and an Earth-like planet. And there may be life!”
小題1:What can we learn about Dr. Marcy from the passage?
A.He is fond of watching Jupiter.
B.He is from a scientist family.
C.He dislikes working with Paul Butler.
D.He is interested in finding life in outer space.
小題2:Which of the following is true of the recent discovery?
A.The planet is not as protective as Jupiter.
B.The planet is close to star 55Cancri.
C.The planet proves to be a gas planet.
D.The planet is as large as Jupiter.
小題3:Dr. Marcy and Dr. Butler began to find new planets in ____.
A.1995B.1985C.2002D.1981
小題4:Dr. Marcy thinks that life may exist in the 55Cancri system because ____.
A.he has found the system similar to the solar system.
B.he has discovered an Earth-like planet there.
C.he has discovered a rocky planet there.
D.he has found signs of life in the system
小題5:“But we stuck with it”( in Paragraph 3) means ____.
A.they felt discouragedB.they carried on with it
C.they failed in their attemptD.they made some progress

小題1:D
小題2:C
小題3:B
小題4:A
小題5:B

試題分析:文章介紹Geoff Marcy從小就對(duì)探索太空中的生命感興趣,他和同事Paul Butler一起努力探索,發(fā)現(xiàn)了66個(gè)新的行星而且還發(fā)現(xiàn)兩個(gè)和太陽(yáng)系很相似的星系,從而證明太空有可能有生命的存在。
小題1:推理判斷題。根據(jù)第二段的首句“What excited me most was whether there were planets in other solar systems where life might exist,”可知他對(duì)探索太空中的生命感興趣。選D
小題2:細(xì)節(jié)題:根據(jù)第五段的最后一句The planet orbiting 55Cancri is a major breakthrough: it is the first sighting of a large gas planet about same distance from the star as Jupiter is from the Sun.可知這個(gè)行星是一個(gè)氣狀體的行星。選C
小題3:細(xì)節(jié)題:從第三段的句子:And he did. “My fellow researcher, Paul Butler, and I found our first planet in 1995,” Dr. Marcy says. “We worked for ten years without finding anything!可知他們是在1995年發(fā)現(xiàn)新的行星的,但是他們努力了10年了,所以是1985年開(kāi)始尋找新行星的,選B
小題4:推理判斷題。根據(jù)最后一段的We would have two striking similarities to our solar system: a Jupiter-like planet and an Earth-like planet. And there may be life!”可推出在太空中可能存在兩個(gè)類(lèi)似于太陽(yáng)系的星系,可能會(huì)有生命存在。選A
小題5:詞義理解題:從第三段的句子:“We worked for ten years without finding anything! 可知“But we stuck with it”是“繼續(xù)”的意思,選B
練習(xí)冊(cè)系列答案
相關(guān)習(xí)題

科目:高中英語(yǔ) 來(lái)源:不詳 題型:閱讀理解

The olinguito(小尖吻浣熊)is new to science. Although lt has been living in the cloud forests of South Amcrica for some time.
Scientists say the olinguito is the first new carnivore(食肉動(dòng)物)discovered In the Americas in more than 30 years. It is a hairy orange-brown creature with a sweet face and big eyes The animal has small. rounded ears and lives in the trees An adult weighs one kilogram and measures about 75 centimeters. with half of those centimeters taken up by its ringed tail Most of the time. it likes to eat fruit, although it also eats meat. Active at night, the animal has lived in Colombia and Ecuador for a long time. But the olinguito did not exist in science books before now.
Kristofer Helgen, director at the National Museum in Washington, led the research team that confirmed the existence of the olinguito. It had been mistaken more than a century ago for a look-alike animal -- a similar but larger olingo(尖吻浣熊). Mr. Helgen had been studying olingos in a museum for ten years. At that time. he observed a difference in the size and shape of the heads and teeth. That led him on an effort to prove he was looking at an animal never before described by science. He got lucky when he communicated with a zoologist in Ecuador. The animal expert there made a short video that shows an olinguito in the trees. The video confirms that the oiinguito is different from the olingo     Mr. Helgen says tens of thousands of olinguitos live in the wild and are not in danger of disappearing forever. Human beings, however, are moving closer to the olinguito habitat in the Andean cloud forests. The research team estimates that 42 percent of historic olinguiio habitat has been removed
小題1:Comparcd with most carnivores. the olinguito may seem more _____.
A.terrbleB.fierceC.cleverD.lovely
小題2:The onlinguito was unknown to people in the past because ____
A.it was mistaken for another species
B.it was active in the eveing
C.it was too small to be seen clearly
D.it covered itself by its long tail
小題3:What does the underlined word "That" in Paragraph 3 refer to?
A.Having been studying olingos for ten years.
B.The short video the animal expert made.
C.His communication with an expert in Ecuador.
D.Differences between olingos and olinguitos.
小題4:We can infer from the text that ______.
A.the olinguito could be made full use of
B.the number of olinguitos is in the conutrol
C.the clinguito is a completely new species up to now
D.people know more and more about animals

查看答案和解析>>

科目:高中英語(yǔ) 來(lái)源:不詳 題型:閱讀理解

What do college teachers think of high school English teachers’English teaching? And how should we see it? Let’s read the following.
A teacher from a community college addressed a sympathetic audience. Heads nodded in agreement when he said, “High school English teachers are not doing their jobs.” He described how weak his students were—all high school graduates who can use language only at a Grade 9 level.
My topic is not standards nor its decline(降低). What the speaker was really saying is that he is no longer young; he has been teaching for sixteen years, and is able to think and speak like a mature adult.
My point is that the frequent complaint of one generation about the one immediately following is natural. It is also human nature to look for the reasons for our dissatisfaction. Before English became a school subject in the late nineteenth century, it was difficult to find the target of the blame for language deficiencies(缺陷). But since then, English teachers have been under constant attack.
The complainers think they have hit upon an original idea. As their own command of the language improves, they notice that young people do not have this same ability. Unaware that their own ability has developed through the years, they assume the new generation of young people must be hopeless in this respect. To the eyes and ears of sensitive adults, the language of the young always seems inadequate.
Since this concern about the decline and fall of the English language is not seen as a generational phenomenon but rather as something new and peculiar(特有的) to today’s young people, it naturally follows that today’s English teachers cannot be doing their jobs.
小題1:The speaker believed that ________.
A.he was an excellent language teacher because he had been teaching English for sixteen years
B.the younger generation was as likely as not worse at language than the older generation
C.high school English teachers should be responsible for their students’ poor command of English
D.The fact that the students didn’t work hard enough contributed to their poor command of English
小題2: In the author’s opinion, the speaker ________.
A.had exaggerated (夸大) the language problems of the students
B.was right in saying English teachers were not doing their jobs
C.gave a correct judgment of the English level of the students
D.thought and spoke in a wise and responsible way
小題3:What can we conclude from the passage?
A.Language learning and improving needs time and effort.
B.The author disagrees with the speaker over the standard of English at Grade 9 level.
C.It is reasonable to include English as one of the high school subjects.
D.The English language teaching is by no means an easy job for college teachers.
小題4:The author’s attitude towards the speaker’s remarks is ________.
A.neutral(中立的)B.critical
C.positiveD.compromising(妥協(xié)的)

查看答案和解析>>

科目:高中英語(yǔ) 來(lái)源:不詳 題型:閱讀理解

All around the world, shoppers flock to Wal-Mart to buy everything. In Texas, they come for another reason: to see the wind turbine(渦輪機(jī)), which supplies 5% of the store’s electricity. It along with other facilities, such as exterior walls coated with heat-reflective paint, makes this Wal-Mart a green giant.
The laws of economics suggest that Wal-Mart, with 5, 200 stores worldwide, influences everything including the price of all kinds of goods. It throws its weight behind environmental responsibility, and the impact could be amazing. “One little change in product packaging could save 1, 500 trees,” says Wal-Mart CEO Lee Scott.“If everybody saves 1, 500 trees or 50 barrels of oil, at the end of the day you have made a huge difference.”
Scott wants Wal-Mart to do its part too. He has promised to cut the existing greenhouse-gas emissions(排放)over the next few years and promised to construct new stores that are more efficient. He wants Wal-Mart’s fleet of more than 7, 000 trucks to get twice as many miles per gallon by 2015. Factories that show Wal-Mart they’re cutting air pollution will get preferential treatment in the supply chain. Wal-Mart says it’s working with consumer-product manufacturers to reduce their packaging and will reward them if they do so.
Some people may doubt it is a bid to attract attention from Wal-Mart’s controversial labor and health-insurance practices. But it’s not just window dressing, because Wal-Mart sees profits in                                                                                          going green. Scott says, “This is a business philosophy, not a social philosophy. We don’t go where we don’t think there’s a great interest in change.”
Like Bill Gates, who started his charitable foundation, Scott happens to be promoting Wal-Mart’s image at a time when his company’s reputation is declining. He acknowledges that he launched the plan partly to shield (保護(hù))Wal-Mart from bad press about its contribution to global warming. “By doing what we’re doing today, we avoid the headline risks that are going to come for people who did not do anything,” he says. “At some point businesses will be held responsible for the action they take.” Meanwhile, should Wal-Mart succeed at shrinking its environmental footprint and lowering prices for green products, both the planet and the company will profit.
小題1:We can infer from the passage that ______.
A.Lee Scott is Wal-Mart’s CEO
B.there are 5, 200 stores in the world
C.Wal-Mart has a great influence on the world market
D.Wal-Mart has more than 7, 000 trucks all over the world
小題2:What does the underlined sentence “This is a business philosophy, not a social philosophy.” mean in the fourth paragraph?
A.Wal-Mart predicts huge profits in its green activity.
B.Wal-Mart’s green activity is just window dressing.
C.Wal-Mart aims to solve its health-insurance practices.
D.Wal-Mart doesn’t have any social responsibility at all.
小題3:What will Wal-Mart probably do in the future?
A.Reduce air pollution in its present stores.
B.Give favorable treatment to its consumers.
C.Ask the factories to reduce their packaging.
D.Demand the fleet of trucks to use more fuel than before.
小題4:What is the main idea of the last paragraph?
A.Provide the background of the green plan.
B.Stress the purpose of Wal-Mart’s green plan.
C.Present the risk that Wal-Mart is facing nowadays.
D.Analyze the similarity between Bill Gates and Scott.

查看答案和解析>>

科目:高中英語(yǔ) 來(lái)源:不詳 題型:閱讀理解

If the eyes are the romantic’s window into the soul, then the teeth are an anthropologist’s ( 人類(lèi)學(xué)家 ) door to the stomach.
In a study published last month in the journal Science, Peter Ungar of the University of Arkansas and his partner, Matt Sponheimer of the University of Colorado, US, examined the teeth of our early human ancestors to find out what they were really eating.
They already knew that different foods cause different marks on teeth. Some cause scratches, while others cause pits (坑).The carbon left on teeth by different foods is also different. Tropical grasses, for example, leave one kind of carbon, but trees leave another kind because they photosynthesized ( 光合作用 ) differently.
Traditionally, scientists had looked at the size and shape of teeth and skulls ( 頭骨 ) to figure out what early humans ate. Big flat teeth were taken to be signs that they ate nuts and seeds, while hard and sharp teeth seemed good for cutting meat and leaves. But this was proven wrong.
The best example was the Paranthropus (傍人), one of our close cousins, some of which lived in eastern Africa. Scientists used to believe Paranthropus ate nuts and seeds because they had big crests(突起)on their skulls, suggesting they had large chewing muscles and big teeth. If this had been true, their teeth should have been covered with pits like the surface of the moon. They would also have had a particular type of carbon on their teeth that typically comes from tree products, such as nuts and seeds.
However, when the two scientists studied the Paranthroupus, it turned out to have none of these characteristics. The teeth had a different kind of carbon, and were covered with scratches, not pits. This suggests they probably ate grass, not nuts and fruit stones. It was the exact opposite of what people had expected to find.
Carbon “foodprints” give us a completely new and different insight into what different species ate and the different environments they lived in. If a certain species had the kind of carbon on its teeth that came from grasses, it probably lived in a tropical grassland, for example.
小題1:The underlined sentence in Paragraph 1 probably means that _____.
A.a(chǎn)nthropologists can study the structure of human stomachs by studying their teeth.
B.a(chǎn)nthropologists can study the diet of early humans by studying their teeth
C.a(chǎn)nthropologists can learn whether humans were healthy by looking at their teeth
D.a(chǎn)nthropologists can get the most useful information about humans from their teeth
小題2:According to Paragraph 3 to 5, which of the following statements is TRUE?
A.Scratches on teeth are caused by eating nuts or seeds.
B.Pits on teeth are caused by eating grass or leaves.
C.Early humans with hard and sharp teeth ate meat and leaves.
D.Different foods leave different marks and carbon on teeth.
小題3:The example of the Paranthropus was mentioned in the article in order to _____.
A.tell readers that they are one of our close cousins living in eastern Africa
B.tell readers they had different eating habits from modern humans
C.prove that size and shape of skulls does not show accurately what early humans ate
D.tell readers that living environment makes a difference to skull structure

查看答案和解析>>

科目:高中英語(yǔ) 來(lái)源:不詳 題型:閱讀理解

In a recent study, researchers have estimated the energy required to produce bottled water, including the energy required to manufacture plastic, make the plastic into bottles, process the water, fill and seal the bottles, transport the bottles, and chill the bottles for use. Combining all the energy input totals for treatment and distribution, researchers found that producing bottled water requires between 5.6 and 10.2 million joules(焦耳) of energy per liter, depending on transportation factors. That's up to 2, 000 times the energy required to produce tap water.
To break down the energy requirements, researchers found that producing the plastic bottles and transporting the bottles greatly dominated(控制) the energy input. Although some companies are experimenting with producing lightweight bottles or using recycled materials, the researchers calculated that the manufacturing cost is about 4 million joules of energy per plastic bottle weighing 38 grams, and the cap weighing 2 grams.
“Our previous work had suggested that bottled water production was an energy­ intensive process, but we were surprised to see the results, ” the researchers said.
Transportation costs vary depending on the distance and mode of transport and both factors depend on the type of bottled water. There are two main kinds of bottled water in the US: spring water” which comes from an underground spring and “purified water”,which is city tap water that has received further treatment. For purified water distributed locally by truck within Los Angeles, the total transportation energy is about 1.4 million joules per liter. In the second situation, spring water shipped from Fiji (such as Fiji Spring Water) across the Pacific to Los Angeles, and then delivered locally by truck requires about 4 million joules per liter for transportation. For the spring water, the transportation energy equaled (in the case of Fiji) the energy required to produce the bottle.
With this data, the researchers hope that future studies will have the ability to make specific estimates for different situations, and possibly find ways to cut energy costs.
小題1:From the first Paragraph we can know that the energy required to ______.
A.produce bottled water includes the energy required to drink it
B.distribute bottled water includes the energy for producing the bottles
C.distribute bottled water is much smaller than the energy for treating it
D.produce bottled water is much smaller than the energy for producing tap water
小題2:To reduce the energy required to produce bottled water, some companies are trying ______.
A.to fill tap water into the plastic bottles directly
B.to replace the plastic bottles with metal containers
C.to produce lightweight bottles with recycled materials
D.to use bicycles to transport and deliver bottled water locally
小題3:What's Paragraph 4 mainly talking about?
A.Treatment of bottled water needs no energy input at all.
B.Bottled water production is an energy­ intensive process.
C.Transportation of bottled water takes up the most energy input.
D.Production of the plastic bottles greatly dominated the energy input.
小題4: We can infer from the passage that ______.
A.there are two main kinds of bottled water in the US
B.world consumption of bottled water has been increasing
C.transportation costs have something to do with the mode of transport
D.bottled water produced in Spring is more expensive than purified water
小題5: What's the main purpose of the passage?
A.To help consumers themselves make more environmentally sustainable choices.
B.To advise the government to take severe measures to stop producing bottled water.
C.To urge the consumers to drink tap water instead of bottled water for the sake of the earth.
D.To try the best to find ways to produce bottled water cheaply and quickly for the companies.

查看答案和解析>>

科目:高中英語(yǔ) 來(lái)源:不詳 題型:閱讀理解

It is true that people with better education are usually able to get better paying jobs. In other words, they have more chances to choose a good job while people with little or no education don’t. It seems that the purpose of education is to make people get jobs. But this isn’t accepted by all people.
Some people may think that a person should spend the best years of his life to get education only for a way of living. This was probably one of the earliest reasons of education. In fact, if education is just a way of making a living, people don’t need to spend so much time in school. People can get education for a living in a short time. Subjects like history and geography need not be taught to everyone. Even language and mathematics need not be taught in detail(詳細(xì)地), either. Here it is clear that education is much more than teaching a man to get a way of living.
Education is well-rounded and it is mainly for improving a man. It is not only to teach him to speak, read and write, but also to develop his creative thinking and other abilities. After that, it is to make him a wise man and thankfully enjoy the achievements of human. Education is to make a man lead a better life. Educated people are expected to be able to listen to good music, read good books, watch plays and most of them take an interest in the world.
I would agree that making a good living is an important reason for education, but certainly not the most important or the main reason.
小題1:People with little education usually ____.
A.spend a long time in school
B.have a good chance to get a job
C.spend the best years to choose jobs
D.have fewer chances to get a good job
小題2:The earliest education was probably to ______.
A.make a man lead a better life
B.teach a man to write and think
C.make people get a way of living
D.teach people to read good books
小題3:It is expected that educated people will be able to _____.
A.a(chǎn)ccept education as a way of living
B.take an interest in the whole world
C.develop their abilities to make plays
D.learn subjects like language and math

查看答案和解析>>

科目:高中英語(yǔ) 來(lái)源:不詳 題型:閱讀理解

A portable lung which could help those with breathing problems lead a normal life is being developed by scientists.
The Swansea University scientists say it could take many years before the device(裝置) , the size of a spectacle box (眼鏡盒) , is available . Lung patients , who have seen how it would work , have welcomed the research.
Its research suggests that one person in every seven in the UK is affected by lung disease---- this equates to approximately 8 million people. As of 6 March 2009, 217 people were on the waiting list for a lung transplant(移植) according to figures by NHS Blood and Transplant .
Now scientists in Swansea are developing a portable artificial lung which could transform (改觀) the lives of patients . Researchers claim that in the long term the device could offer an alternative to lung transplant , giving hope to those who suffer from conditions such as emphysema(肺氣腫) and cystic fibrosis.
The device mimics the function of a lung---by getting oxygen into and carbon dioxide out of the blood stream . Professor Bill Johns came up with the idea after his son died of Cystic Fibrosis . It is important that we make something that will help people , who instead of being confined (局限) to a wheelchair with an oxygen bottle , can actually walk around and do things for themselves , he said.
Although the research has been welcomed by leading charities(慈善) , caution has also been voiced over the length of time it will take before a portable lung will become available .
“We have to stress that this is several years away from being used , even in a trial stage,” said Chris Mulholland , head of the British Lung Foundation.
Patient Elizabeth Spence from Swansea has been refused the double lung transplant she needs but remains hopeful that one day the new device could save her . “ My body will reject the lungs , so this possibly could be an answer--- another way of getting new lungs without actually having the transplant,” she said.
小題1:Which of the following about the portable lung would the author agree?
A.It can help a lot in lung transplants
B.It was once on display
C.It works differently from the normal one in the body
D.It’s just like an oxygen bottle.
小題2:It seems as if _______ really matters before the portable lung is put into use.
A.supportB.moneyC.timeD.trial
小題3:What’s the author’s attitude towards the portable lung ?
A.Negative.B.Doubtful.C.Curious.D.Objective.
小題4:Which edition can you probably find the passage ?
A.Science.B.Culture.C.Economy.D.Education.

查看答案和解析>>

科目:高中英語(yǔ) 來(lái)源:不詳 題型:閱讀理解

Deputy Agriculture Secretary Kathleen Merrigan sees an epidemic (流行病) sweeping across Americas farmland. It has little to do with the usual challenges, such as flood, rising fuel prices and crop-eating insects. The country's farmers are getting older, and there are fewer people standing in line to take their place. National agricultural census (普查) figures show that the fastest-growing group of farmers is the part over 65. Merrigan is afraid the average age will be even higher when the 2012 statistics are completed.
Merrigan, a former college professor, is making stops at universities across the country in hopes of encouraging more students to think about careers in agriculture. Aside from trying to stop the graying of America's farmers, her work is made tougher by a recent blog posting that put agriculture at No.1 on a list of "useless" college degrees. Top federal agriculture officials are talking about the posting, and it has the attention of agricultural organizations across the country.
“There couldn't be anything that's more incorrect," Merrigan said. "We know that there aren't enough qualified graduates to fill the jobs that are out there in American agriculture.
In addition, a growing world population that some experts predict will require 70% more food production by 2050, she said.
“I truly believe we're at a golden age of agriculture. Global demand is at an all-time record high, and global supplies are at all-time record lows," said Matt Rush, director of the Texas Farm Bureau. "Production costs are going to be valuable enough that younger people are going to have the opportunity to be involved in agriculture”.
The Department of Agriculture has programs aimed at developing more farmers and at increasing interest in locally grown food. The National Young Farmers' Coalition has also been pushing for state and federal policy changes to make it easier for new fermers.
Ryan Best, president of Future Fanners of America, has been living out of a suitcase, traveling the country and visiting with high school students about careers in agriculture. The 21 -year-old Best hopes his message-that this is a new time in agriculture-will motivate the next generation to turn around the statistics.“Never before have we had the innovations (創(chuàng)新)in technology which have led to agriculture in this country being the most efficient it has ever been” he said. “There’s really a place for everybody to fit in”
小題1:What is the new challenge to American agriculture?
A.Fewer and older farmers.B.Higher fuel prices.
C.More natural disasters.D.Lower agricultural output.
小題2:Why is Merrigan visiting universities across the country?
A.To draw federal agriculture officials' attention
B.To select qualified agriculture graduates.
C.To clarify a recent blog posting.
D.To talk more students into farming careers
小題3:According to Matt Rush, American agriculture will provide opportunities for younger people because__________.
A.the government will cover production costs
B.global food supplies will be even lower
C.investment in agriculture will be profitable
D.America will increase its food export
小題4:What do the underlined words "to turn around the statistics" in the last paragraph mean?
A.To re-analyze the result of the national census.
B.To increase production.
C.To bring down the average age of farmers.
D.To invest more in agriculture.

查看答案和解析>>

同步練習(xí)冊(cè)答案
妖精视频成人观看www| 无码免费一区二区三区| 黄色三级网站在线观看| 成人在线高清免费| 欧美日韩国产免费观看视频| 韩国v欧美v日本v亚洲v| 欧美日韩一区二区三区在线免费观看| 国产在线精品一区二区| 亚洲线精品一区二区三区 | 亚洲精品日韩av| 青青艹视频在线| 美国黄色小视频| 四虎影视在线播放| 玖玖精品一区| 美女网站在线免费欧美精品| 富二代精品短视频| 欧美激情成人在线视频| 亚洲韩国在线| 国产传媒国产传媒| 最新国产在线| 一区二区在线免费播放| 久久成人av少妇免费| 一本大道综合伊人精品热热| 久久久久久久久久久免费| 热这里只有精品| 日本精品久久久久中文| 最近最新中文字幕在线| 日韩精品中文字幕一区二区 | 日本在线电影一区二区三区| 91丨porny丨国产入口| 精品88久久久久88久久久| 亚洲www永久成人夜色| 亚洲va综合va国产va中文| 亚洲毛片一区二区三区| 1区2区在线| 一本综合久久| 一本色道综合亚洲| 国产不卡在线观看| 任你操这里只有精品| 欧美一级淫片免费视频黄| 男女在线观看视频| 一区二区91| 色综合天天综合网天天看片| 欧美在线一区二区视频| 女人另类性混交zo| 中文字幕视频免费观看| 日本免费久久| 美国一区二区三区在线播放 | 91美女片黄在线观| 男人女人拔萝卜视频| 亚洲精品久久久久久无码色欲四季 | 91精品啪在线观看国产81旧版| 亚洲同性gay激情无套| 美女少妇精品视频| 亚洲 欧美 综合 另类 中字| 亚洲视频免费播放| 人狥杂交一区欧美二区| 久久不射2019中文字幕| 欧美日韩精品一区二区三区| 99视频在线| 国产精品扒开腿做爽爽| 国产香蕉在线| 欧美日本在线| 一本色道久久综合狠狠躁的推荐| 国产成人精品一区二区| 中文字幕亚洲影院| 蜜臀久久99精品久久久| 日本午夜精品| 亚洲婷婷综合色高清在线| 97视频免费在线看| www.桃色.com| 中国国产一级毛片| 久久免费精品视频在这里| 亚洲自拍偷拍综合| 国产精品免费久久久久久| 久久久精品人妻一区二区三区| 日本黄色三级视频| av在线不卡顿| 调教+趴+乳夹+国产+精品| 国产精品一区二区三区久久| 精品国产aⅴ一区二区三区东京热| 色婷婷综合缴情免费观看| 不卡日本视频| 五月天激情综合| 91美女片黄在线观| 在线看片中文字幕| 菠萝蜜视频在线观看www入口| 日本伊人午夜精品| 国产丝袜一区视频在线观看 | 亚洲影视中文字幕| a天堂中文字幕| 四虎影视国产在线视频| 老司机午夜精品| 日韩电视剧免费观看网站| 国产盗摄视频在线观看| 国产精品高清无码| 久久97精品| 一区二区三区四区不卡在线| 国产欧美一区二区三区在线| 久久久无码人妻精品一区| h网站久久久| 久久精品国产在热久久| 在线观看精品自拍私拍| 国产男女激情视频| 男女激情片在线观看| 亚洲精品在线观看91| 精品视频免费看| 亚洲欧洲另类精品久久综合| 亚洲av无码不卡| 日韩欧美天堂| 日韩欧美中文字幕在线观看| 国内视频一区| 国产精品男女视频| 国产精品videossex| 亚洲成人免费在线观看| 国产私拍一区| 欧美日韩一二三四区| 99这里只有精品视频| 亚洲综合区在线| 国产一区二区不卡视频在线观看| 久久午夜无码鲁丝片| 国产精久久久| 亚洲永久免费av| 精品国产一区二区三区日日嗨| 日韩av一二三区| 综合中文字幕| 欧美日韩亚洲天堂| 午夜精品一区二区在线观看 | 日韩欧美一区二区三区免费观看| 26uuuu精品一区二区| 国产精品av在线| 国产日产精品一区二区三区的介绍| 成人影院网站| 日韩一区在线播放| 国产欧美一区二区三区另类精品| 国产一级淫片免费| 久久91在线| 欧美在线制服丝袜| 日韩精品一区二区三区电影| 日本高清视频免费看| 黄色成人精品网站| 日韩精品视频免费| 成人日韩在线视频| 99久久精品免费观看国产| 不卡一区二区在线| 国产一区欧美二区三区| 日韩av片在线播放| 视频一区中文| 精品免费国产一区二区三区四区| 男人天堂1024| 91伦理视频在线观看| 国产精品白丝jk白祙喷水网站| 97成人超碰免| 午夜国产福利一区二区| 国产伦精品一区二区三区免费优势| 色悠悠亚洲一区二区| 国产一二三四五| 最新国产在线| 国产成人免费高清| 国产精品日韩在线播放| 精品美女久久久久| 欧美伦理在线视频| 亚洲精品国偷自产在线99热 | 久久精品播放| 日韩大陆欧美高清视频区| 亚洲天堂av一区二区| 欧洲黄色一区| 亚洲日本乱码在线观看| 四虎影视永久免费在线观看一区二区三区| h狠狠躁死你h高h| 久久精品人人做人人爽电影蜜月| 欧美伦理91i| 极品色av影院| 校花撩起jk露出白色内裤国产精品| 日韩欧美中文字幕制服| 日本一二区免费| 成人午夜视屏| 色综合久久久网| 男人的天堂狠狠干| 精品美女在线观看视频在线观看 | 国产亚洲福利| 午夜精品福利视频| 日本少妇xxxx动漫| 欧美国产免费| 欧美乱大交xxxxx| 久草视频在线免费看| 99精品在线免费在线观看| 中文一区二区视频| 免费一级特黄3大片视频| 欧美在线关看| 亚洲男女自偷自拍图片另类| 好吊日免费视频| 国产精品丝袜在线播放| 亚洲福利影片在线| 天天插天天射天天干| 1204国产成人精品视频| 亚洲级视频在线观看免费1级| 亚洲啪av永久无码精品放毛片 | 欧美精品videos| 免费毛片一区二区三区| 伊人激情综合| 欧美性做爰毛片| 日韩欧美一级大片| 日韩不卡免费视频| 成人免费观看a| 成人爽a毛片一区二区| 国产**成人网毛片九色 | av无码一区二区三区| 国内视频在线精品| 亚洲午夜女主播在线直播| 一二三四国产精品| 久久亚洲国产| 久久久久久噜噜噜久久久精品| 尤物视频在线观看国产| 国产亚洲激情| 91久久精品美女| 成人免费一级视频| 91色九色蝌蚪| 香蕉视频免费版| 久草在线视频资源| 在线观看国产一区二区| 欧美体内she精高潮| 亚洲精品不卡在线观看| 亚洲美女又黄又爽在线观看| 日韩精品一区二区三区在线视频| 91精品电影| 日本一区二区不卡| 国产肥老妇视频| 波多野结衣在线aⅴ中文字幕不卡| 欧美一区二视频在线免费观看| 欧美一区二区视频| 亚洲精品中文在线| 97公开免费视频| 国产成人久久精品一区二区三区| 日韩国产中文字幕| 中文字幕影音先锋| 午夜在线视频观看日韩17c| 91香蕉亚洲精品| 一级毛片在线观| 一区二区三区在线观看动漫| 北条麻妃av高潮尖叫在线观看| 亚洲青青久久| 在线观看日韩欧美| 日韩色图在线观看| 国产伦精品一区二区三区视频青涩 | 国产视频第一页在线观看| 午夜日韩在线观看| 国产chinesehd精品露脸| 丝袜美腿一区二区三区动态图| 久久视频精品在线| 伊人网av在线| 91首页免费视频| 美女日批免费视频| 亚洲国产91视频| 色老头一区二区三区| 久久精品99北条麻妃| 成人黄色国产精品网站大全在线免费观看| 亚洲日本理论电影| 一二三四视频在线中文| 亚洲国产精品999| 久久视频免费看| 狠狠色综合播放一区二区| 亚洲人成人77777线观看| 欧产日产国产精品视频| 亚洲第一视频在线观看| 久久精品国产av一区二区三区| 蜜桃传媒麻豆第一区在线观看| 欧美中日韩免费视频| 麻豆理论在线观看| 国产丝袜一区二区| 国产女主播喷水视频在线观看| 成人精品视频一区二区三区 | 奇米影视777在线欧美电影观看 | 最新av在线网站| 精品国产老师黑色丝袜高跟鞋| 李丽珍裸体午夜理伦片| 欧美国内亚洲| 国外成人免费视频| av资源中文在线| 亚洲人成电影网站色| 探花国产精品一区二区| 久久久亚洲午夜电影| 日本xxxxxxx免费视频| 久操成人av| 成人免费观看a| 国产在线高清理伦片a| 精品乱人伦一区二区三区| 精品成人久久久| 96av麻豆蜜桃一区二区| 欧美日韩大尺度| 成人嘿咻视频免费看| 91丨九色丨国产在线| 欧美1234区| 一区二区三区www| 国产欧美熟妇另类久久久| 一区二区三区在线免费播放| 亚洲第一成人网站| 日韩av中文字幕一区二区| 欧美性受黑人性爽| 97se亚洲| 国产欧美日韩高清| 菠萝菠萝蜜在线视频免费观看| 精品国免费一区二区三区| 无码人妻熟妇av又粗又大| 欧美激情自拍偷拍| 9.1在线观看免费| 亚洲欧美bt| 日本aa在线观看| 天天久久夜夜| 97人人干人人| 日韩精品一区二区三区| 欧美成人激情在线| 欧洲成人av| 日韩精品一区二区三区视频在线观看| www亚洲视频| 中文字幕中文字幕一区| 粉嫩av蜜桃av蜜臀av| 久久99久久久欧美国产| 18禁男女爽爽爽午夜网站免费| 久久网站免费观看| 日韩电影天堂视频一区二区| 91精品国产一区二区在线观看| 欧美做受高潮1| 最新黄网在线观看| 日韩在线视频网站| 一二三区在线观看| 精品成a人在线观看| 国产激情无套内精对白视频| 欧美性xxxxxx| av黄色在线看| 一区二区三区在线不卡| 色老板免费视频| 91免费小视频| 亚洲综合自拍网| 国产综合久久久久久久久久久久| 一区二区在线播放视频| 国内精品99| 999一区二区三区| 久久国产精品亚洲人一区二区三区| 青青成人在线| 精品淫伦v久久水蜜桃| 国产欧美一区二区三区不卡高清| 日日夜夜一区| 亚洲伊人一本大道中文字幕| 精品三级在线| 成人a免费视频| 福利一区和二区| 国产精品视频中文字幕91| 国产免费不卡| 国产精品成av人在线视午夜片| 国产激情视频在线看| 国产69久久精品成人| a级片在线免费| 久久久久久久久久久人体| 日韩另类在线| 97精品一区二区三区| av片在线观看免费| 久久久久久国产| 成人在线播放| 久久人91精品久久久久久不卡| 黄视频网站在线看| 色综合久久精品亚洲国产| a视频在线播放| 欧美福利视频在线| av资源一区| 国产精品96久久久久久| 日本不卡一二三| 亚洲自拍小视频免费观看| 精品国产亚洲一区二区三区大结局| 97netav| 国产福利资源一区| 欧美亚洲免费高清在线观看| 国产精品羞羞答答在线观看| 日韩av高清在线播放| 精品久久91| 黄色三级中文字幕| 亚洲精品1区2区| 亚洲天堂网2018| 国产suv精品一区二区6| 国产免费看av| 国产精品你懂的在线欣赏| 久久久久性色av无码一区二区| 亚洲一区免费在线观看| 人人草在线观看| 欧美日韩国产一二三| 色欲av永久无码精品无码蜜桃| 亚洲成成品网站| 国产一级网站视频在线| 欧美成人免费全部| 日本不良网站在线观看| 91精品在线国产| 岛国精品一区| 看全色黄大色大片| 日韩视频久久| 日本一区二区三区在线免费观看| 成人一道本在线| 国产精品成人69xxx免费视频| 亚洲一二三四区| 国产又色又爽又黄又免费| 亚洲精品一区二区三区影院|