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

Scientists discovered 163 new species in Southeast Asia’s Greater Mekong region last year,but all are at risk of extinction due to climate change,the WWF said in a report released Friday.
The newly discovered creatures include a bird­eating frog with fangs (毒牙),a bird that would rather walk than fly and a gecko (壁虎) whose alien appearance inspired the report’s title of “Close Encounters”,the conservation group said.
The report was released ahead of major UN talks on climate change in Bangkok next week,which are being held before a make­or­break summit in Copenhagen this December.
“Some species will be able to adapt to climate change,and many will not,potentially resulting in massive extinction,” Stuart Chapman,director of the WWF Greater Mekong program,said in the report.“Rare and endangered species like those newly discovered are especially vulnerable (易受傷害的) because climate change will further shrink their already restricted habitats,” he said.
“The new discoveries in 2010 include 100 plants,28 fish,18 reptiles,14 amphibians,2 mammals and a bird,”the WWF report said.The area spans Cambodia,Laos,Myanmar,Thailand,Vietnam and China’s Yunnan Province.
“Among the new species is the bird­eating fanged frog,which remains hidden in a protected area of Thailand despite the fact that scientists are studying there for 40 years,” the report said.
The tiger­striped pit viper was discovered accidentally on an island off the coast of Vietnam when a scientist was looking  for a lizard and his son pointed out that his hand was on a rock right next to  the snake’s fangs.“We caught the snake and the gecko and they both proved to be new species,” researcher Lee Grismer of La Sierra University in California was quoted as saying in the report.The leopard gecko,found on another Vietnamese island,has the coloring of a leopard and bizarre orange,cat­like eyes and thin legs.
The Greater Mekong region has proved a rich area  for scientists.The WWF said in December 2010 that it had found 1,068 new species there between 1997 and 2009.
小題1:What is special about the newly discovered bird?
A.It usually walks.
B.It likes walking and flying.
C.It can eat other birds.
D.It can eat frogs.
小題2:Stuart Chapman believes that________.
A.most of the newly discovered species can adapt to climate change
B.climate change can cause massive extinction of the newly discovered species
C.the newly discovered species are not so vulnerable to climate change
D.many species have already died out because of climate change
小題3:When Lee Grismer discovered the tiger­striped pit viper,he probably felt________.
A.frightenedB.disappointed
C.excitedD.puzzled
小題4:What does the passage mainly tell us?
A.The Greater Mekong region is a rich area for scientists.
B.Many rare species remain to be discovered in the Mekong region.
C.Scientists have discovered many new species in the Mekong region.
D.Climate change threatens Mekong new species.

小題1:A
小題2:B
小題3:C
小題4:D

小題1: A
解析 細節(jié)理解題。由文章第二段第一句可知,這種新發(fā)現(xiàn)的鳥的獨特之處是它喜歡行走,而不是飛翔。
小題2: B
解析 細節(jié)理解題。由文章第四段可知,這些新發(fā)現(xiàn)的物種很少能適應(yīng)氣候變暖,因此會出現(xiàn)大量滅絕的情況。
小題3: C
解析 推理判斷題。由文章倒數(shù)第二段可知,這種蛇的發(fā)現(xiàn)很偶然,而且后來被證明是一個新的物種,因此發(fā)現(xiàn)者應(yīng)該感到“驚喜”,故選excited。
小題4: D
解析 主旨大意題。由文章第一段可知,本文重點在于說明大湄公河次區(qū)新發(fā)現(xiàn)的物種面臨受氣候變暖瀕臨滅絕的危險,而不是強調(diào)新物種的發(fā)現(xiàn),故選D項。
練習(xí)冊系列答案
相關(guān)習(xí)題

科目:高中英語 來源:不詳 題型:完形填空

If you want to learn a new language,the very first thing to think about is why.Do you need it for a____reason,such as your job or your studies?__2__perhaps you’re interested in the____,films or music of a different country and you know how much it will help to have a____of the language.
Most people learn best using a variety of____,but traditional classes are an ideal(理想的)start for many people.They____an environment where you can practice under the ____ of someone who’s good at the language.We all lead ____ lives and learning a language takes____.You will have more success if you study regularly,so try to develop a____.It doesn’t matter if you haven’t got long.Becoming fluent in a language will take years,but learning to get by takes____.
Many people start learning a language and soon give up.“I’m too____,” they say.Yes,children do learn languages more ___ than adults,but research has shown that you can learn a language at any____.And learning is good for the health of your brain,too.I’ve also heard people____ about the mistakes they make when____.Well,relax and laugh about your mistakes ____you’re much less likely to make them again.
Learning a new language is never ___.But with some work and devotion,you’ll make progress.And you’ll be ____by the positive reaction of some people when you say just a few words in ___ own language.Good luck!                                 (2013·安徽)
小題1:
A.technicalB.political
C.practicalD.physical
小題2:
A.AfterB.So
C.ThoughD.Or
小題3:
A.literatureB.transport
C.a(chǎn)gricultureD.medicine
小題4:
A.viewB.knowledge
C.formD.database
小題5:
A.paintingsB.regulations
C.methods D.computers
小題6:
A.protectB.change
C.respectD.provide
小題7:
A.controlB.command
C.guidanceD.pressure
小題8:
A.busyB.happy
C.simpleD.normal
小題9:
A.courageB.time
C.energyD.place
小題10:.
A.theoryB.business
C.routineD.project
小題11:
A.some risksB.a(chǎn) lot less
C.some notesD.a(chǎn) lot more
小題12:
A.oldB.nervous
C.weakD.tired
小題13:
A.closelyB.quickly
C.privatelyD.quietly
小題14:
A.a(chǎn)geB.speed
C.distanceD.school
小題15:.
A.worryB.hesitate
C.thinkD.quarrel
小題16:
A.singingB.working
C.bargainingD.learning
小題17:
A.ifB.a(chǎn)nd
C.butD.before
小題18:
A.tiresomeB.hard
C.interestingD.easy
小題19:
A.blamed B.a(chǎn)mazed
C.interruptedD.informed
小題20:
A.theirB.his
C.ourD.your

查看答案和解析>>

科目:高中英語 來源:不詳 題型:閱讀理解

I’ve always known my kids use digital communications gear (裝置) a lot.But my cellphone bill last month really grabbed my attention.My son had come up to nearly 2,000 incoming text messages,and had sent nearly as many.Of course,he was out of school for the summer and communicating more with friends from a distance.Nevertheless,he found time to hold down a summer job and complete a college course in between all that typing with his thumb.
I was even more surprised to learn that my son is normal.“Teenagers with cellphones each send and receive 2,272 text messages a month on average,” Nielsen Mobile says.
Some experts regret that all that  keyboard jabber is making our kids stupid,unable to read non­verbal cues such as facial expressions,gestures,posture and other silent signals of mood and attitude.Unlike phones,text messaging doesn’t even allow transmission of tone of voice or pauses,says Mark Bauerlein,author of a book called The Dumbest Generation:How the Digital Age Stupefies Young Americans and Jeopardizes Our Future.
Beyond that,though,I’m not sure I see as much harm as critics of this trend.I’ve posted before on how I initially tried to control my kids’ texting.But over time,I have seen my son suffer no apparent ill effects,and he gains a big benefit,of easy,continuing contact with others.
I don’t think texting make kids stupid.It may make them annoying,when they try to text and talk to you at the same time.And it may make them distracted,when buzzing text messages interrupt efforts to noodle out a math problem or finish reading for school.
But I don’t see texting harming teens’ability to communicate.My son is as accustomed to nonverbal cues as any older members of our family.I have found him more engaged and easier to communicate with from a great distance,because he is constantly available via text message and responds with faithfulness and speed.
小題1:What does the underlined word “distracted” in the fifth paragraph mean?
A.Confused.B.Absent­minded.
C.Comfortable.D.Bad­tempered.
小題2:What would be the best title for this passage?
A.For Teens,Texting Instead of Talking
B.For Parents,Caring Much for Their Kids
C.Advantages and Disadvantages of Texting
D.The Effect of Communication
小題3:The author’s attitude towards texting is________.
A.objectiveB.opposed
C.supportiveD.doubtful
小題4:According to the passage,which of the following statements is NOT true?
A.It is normal for a teen to send or receive 60 text messages a day.
B.Texting is a very popular way of communication among teens.
C.When texting,teens never mind talking with others.
D.The writer limited his son to send or receive text messages at first.

查看答案和解析>>

科目:高中英語 來源:不詳 題型:閱讀理解

When author Nicholas Carr began researching his book on whether the Internet is ruining our minds,he restricted his online access and e­mail.His new book argues the latest technology renders us less capable of deep thinking.Carr found himself so distracted(分心的) that he couldn’t work on the book while staying as connected.After first feeling confused by his sudden lack of online connection,he was able to stay focused on one task for a long period within several weeks.
Reading on the Internet has changed how we use our brains.Facing a lot of texts,video,music and links to other web pages and blogs,our minds have become used to skimming and scanning information.As a result,we have developed sharper skills at making fast decisions,particularly visual ones,Carr wrote.
But now most of us seldom read books or long articles that would help us focus.We are becoming more like librarians—able to find information quickly and see clearly the best nuggets(有價值的資料).That lack of focus hinders(阻礙) our long­term memory,leading many of us to feel distracted,he wrote.
“What we are losing is a whole other set of mental skills,which require not the shifting of our focus but the maintaining of our focus,” Carr said,adding that for centuries books protected our brains from distraction and focused our minds on one topic at a time.
But with devices such as Apple’s iPad becoming common,Carr predicts books also will change.“New forms of reading always require new forms of writing,” he said.Carr has a suggestion for those who feel web surfing has left them incapable of concentration—slow down,turn off the Internet and practice the skills of contemplation(沉思) and reflection.“It is pretty clear from the brain science that if you don’t exercise particular cognitive skills,you are going to lose them,” he said.“If you are constantly distracted,you are not going to think in the same way that you would think if you paid attention.”
小題1:What topic is Nicholas Carr’s new book mainly concentrating on?
A.Whether there is any need for us to surf the Internet.
B.How the Internet changes our way of thinking.
C.What we should do when we are surfing the Internet.
D.Whether our minds are being influenced by the Internet.
小題2:How did Nicholas Carr feel after he limited his time online several weeks later?
A.Anxious.B.Relaxed.
C.Concentrated.D.Puzzled.
小題3:The underlined word renders in Paragraph 1 probably means ________.
A.preventsB.causes
C.protectsD.sharpens
小題4:What’s Nicholas Carr’s suggestion for people who are often distracted by the Internet?
A.They should read more books besides surfing the Internet.
B.They should often slow down their pace of modern living.
C.They should often get away from the disturbing of the Internet.
D.They should spend more time thinking while surfing the Internet.

查看答案和解析>>

科目:高中英語 來源:不詳 題型:閱讀理解

Forbes asked a panel of architects and campus designers to nominate their picks for the best-looking campuses in the world. These are their top choices.
Kenyon College
Gambier, Ohio, US
Mike Evans, a principal at Norfolk, Va., design firm Hanbury Evans Wright Vlattas + Company, says to be beautiful a campus must have a “signature campus space as a carrier of the campus brand.” At Kenyon College, that space is “Middle Path,” a 10-foot-wide footpath that serves as the Gothic hilltop campus’ central artery. More than just a trail, it’s a village green for the tight-knit campus community. Sergei Lobanov-Rostovsky, who teaches 17th-century poetry at Kenyon, says the college, both isolated and pastoral, is “a small place to think big thoughts.”
Oxford University
Oxford, England
Teaching within Oxford’s stone walls dates as far back as the 11th century, and the school is considered a paradigm(典范) for all college campuses. With its labyrinth of quads, cloisters, and archways, it evokes elegance and tradition at every turn. “Its monastic roots and the spectacular quality of its buildings make it an architectural wonderland,” says David Mayernik, associate professor at Notre Dame’s School of Architecture.
Princeton University
Princeton, N.J., US
Princeton’s style is pure Collegiate Gothic(學(xué)院派哥特式); most of it executed in gray stone covered in, yes, ivy. As imposing as these old stone structures are, the campus keeps life on a “human scale” by preserving green spaces and walkability.Sinuous footpaths, archways, plazas – all are designed to inspire spontaneous discussion and learning.
Scripps College
Claremont, Calif., US
The total plan of this women’s college, founded in the 1920′s, has always called for artistic connection between buildings and landscape. Together, architect Gordon Kaufmann, in collaboration with landscape architect Edward Huntsman-Trout, created a distinctively Southern Californian blend of Mission Revival-inspired architecture and landscape, which is lovely, evocative and intact. An expert in deciduous trees, Trout planted rows of liquid amber trees to give the students “a sense of autumn” come fall. He also peppered the campus with tulip trees, sycamores, almond and orange trees, as well as rare shrubs.
Stanford University
Palo Alto, Calif., US
New additions like the Science and Engineering Quad manage to gracefully blend modern and technological elements with the timeless, elegant aesthetics of the campus’ early California Mission Revival architecture. The campus also scores big points for its dramatic entrance via Palm Drive, its romantic Spanish red-tile roofs and myriad patches of green.
Tsinghua University
Beijing, China
Forbe’s panel of architects says natural setting plays a big part in assessing a campus’ beauty. In that regard, this campus is blessed: Founded in 1925, Tsinghua sits on the former site of the Qing Dynasty’s royal gardens. Many of Beijing’s most notable historical sites, like the Summer Palace, are close by. The campus is peppered with artificial ponds where stone benches and floating lotus blossoms inspire reflection.
小題1:In this text, the writer mentioned many best-looking campuses in the world. How many Universities are in America?
A.Six.B.Three.C.Four.D.Five.
小題2:which school is considered a paradigm for all college campuses.?
A.Oxford University.B.Stanford University.
C.Scripps College.D.Princeton University.
小題3:Which University has the style of pure Collegiate Gothic?
A.Tsinghua UniversityB.Oxford University
C.Princeton UniversityD.Kenyon College
小題4: In which part of a magazine can we probably read this passage?
A.Entertainment.B.Education.C.Culture.D.Health.
小題5:Why does Tsinghua University enter the list of the best-looking campuses in the world?
A.because the amber trees give the students “a sense of autumn” come fall.
B.because the artistic connects between buildings and landscape.
C.because its natural setting plays a big part.
D.because it is founded in 1925.

查看答案和解析>>

科目:高中英語 來源:不詳 題型:閱讀理解

  Mass transportation revised the social and economic fabric of the American city in three fundamental ways. It catalyzed physical expansion, it sorted out people and land uses, and it accelerated the inherent instability of urban life. By opening vast areas of unoccupied land for residential expansion, the omnibuses, horse railways, commuter trains, and electric trolleys pulled settled regions outward two to four times more distant form city centers than they were in the premodern era. In 1850, for example, the borders of Boston lay scarcely two miles from the old business district; by the turn of the century the radius extended ten miles. Now those who could afford it could live far removed from the old city center and still commute there for work, shopping, and entertainment. The new accessibility of land around the periphery of almost every major city sparked an explosion of real estate development and fueled what we now know as urban sprawl. Between 1890 and 1920, for example, some 250,000 new residential lots were recorded within the borders of Chicago, most of them located in outlying areas. Over the same period, another 550,000 were plotted outside the city limits but within the metropolitan area. Anxious to take advantage of the possibilities of commuting, real estate developers added 800,000 potential building sites to the Chicago region in just thirty years – lots that could have housed five to six million people.
Of course, many were never occupied; there was always a huge surplus of subdivided, but vacant, land around Chicago and other cities. These excesses underscore a feature of residential expansion related to the growth of mass transportation: urban sprawl was essentially unplanned. It was carried out by thousands of small investors who paid little heed to coordinated land use or to future land users. Those who purchased and prepared land for residential purposes, particularly land near or outside city borders where transit lines and middle-class inhabitants were anticipated, did so to create demand as much as to respond to it. Chicago is a prime example of this process. Real estate subdivision there proceeded much faster than population growth.
小題1:With which of the following subjects is the passage mainly concerned?
[A] Types of mass transportation.
[B] Instability of urban life.
[C] How supply and demand determine land use.
[D] The effect of mass transportation on urban expansion.
小題2:Why does the author mention both Boston and Chicago?
[A] To demonstrate positive and negative effects of growth.
[B] To exemplify cities with and without mass transportation.
[C] To show mass transportation changed many cities.
[D] To contrast their rate of growth.
小題3:According to the passage, what was one disadvantage of residential expansion?
[A] It was expensive.
[B] It happened too slowly.
[C] It was unplanned.
[D] It created a demand for public transportation.
小題4:The author mentions Chicago in the second paragraph as an example of a city,
[A] that is large.
[B] that is used as a model for land development.
[C] where the development of land exceeded population growth.
[D] with an excellent mass transportation system.
Vocabulary
1.revise          改變
2.fabric          結(jié)構(gòu)
3.catalyze          催化,加速
4.sort out          把……分門別類,揀選
5.omnibus          公共汽車/馬車
6.trolley          (美)有軌電車,(英)無軌電車
7.periphery       周圍,邊緣
8.sprawl          建筑物無計劃延伸,蔓延,四面八方散開
9.lot          小片土地
10.underscore       強調(diào),在下面劃橫線
11.transit lines       運輸線路
12.subdivision       (出售的)小塊土地,再劃分小區(qū)

查看答案和解析>>

科目:高中英語 來源:不詳 題型:閱讀理解

Even while in a deep sleep, people can still learn brand new information. Sleepers soak in new associations between smells and sounds, knowledge that lingers(逗留)into the next waking day, researchers report online August 26 in Nature Neuroscience.
The new study is the first to show that entirely new information can get into the sleeping mind, says Anat Arzi of the Weizmann Institute of Science in Israel. "The brain is not passive while you sleep. It's quite active. You can do quite a lot of things while you are asleep."
But the results don't mean that Spanish vocabulary tapes now have a place on the nightstand. L, Researchers have tried but largely failed to find evidence that complicated information, such as new pairs of words, can make its way into the brain during sleep.
Instead of trying to teach people something complicated like a new language, Arzi and her colleagues relied on the sense of smell and hearing. As anyone who has walked by a dumpster(垃圾車)in July knows, smells can cause a nose-jerk reaction. Catching a bad smell automatically makes people inhale(吸氣)less, reducing the size of the inhale. But scent of fresh bread causes a long, deep inhale.、rzi and her team took advantage of this reaction for their experiment.
As people slept in the laboratory, the researchers delivered pleasant scent, such as shampoo. As this nice smell got into the sleepers' noses, the researchers played a particular music. Later, a disgusting smell, such as rotten fish or meat, was paired with a different music. Neither the smell nor the sound woke people up. After just four exposures to the smell-music pair during a single night, the sleepers started to automatically respond to the tones without the accompanying smells, taking in bigger breaths when the shampoo-associated tone played and smaller breaths when played the sound linked to the rotten fish smell.
This new learned association lingered into the next waking day, too. Even though the sleepers had no idea they had been exposed to smells or sounds, their behavior proved that their brain had actually learned something during sleep. As before, the shampoo sound stimulated a long, deep inhale, while the rotten fish tone caused more shallow breaths.
小題1:We can infer from the passage that
A.while sleeping, we can learn whatever we want to learn
B.we will increase the size of inhale if we catch a pleasant smell
C.the knowledge we learned while sleeping will be forgotten in the next waken day
D.when walking by a bakery, the fresh bread will cause a nose-jerk reaction
小題2:What is Paragraph 3 mainly about?
A.One can’t acquire complicated knowledge during the sleeping hours.
B.Spanish vocabulary tapes now have a place on the nightstand
C.Researchers have tried to find evidence that the new words can be learned during sleep.
D.Complicated information can make its way into the brain during sleep
小題3:How do Arzi and her team do their research? By
A.giving instructionsB.a(chǎn)nalyzing human brains
C.following the guides of othersD.doing experiments
小題4:In which part of a website may this passage most likely appear?
A.Culture.B.Science.C.History.D.Economy.

查看答案和解析>>

科目:高中英語 來源:不詳 題型:閱讀理解

Across the United States, universities and colleges have been looking to become more sustainable (可持續(xù)發(fā)展的) and more than 600 schools have already planned to become eco-friendly. The EcoDorm, home to 36 students at Warren Wilson College in Swannanoa, was designed to be sustainable from top to bottom, or in this case, from its rainwater-collection system to its garden. The dormitory is bringing new meaning to the concept of living “green” at college.
At Warren Wilson College, a biological science school with fewer than 1,000 students, the sustainability drive came from the student body. The EcoDorm concept was presented ten years ago by two students; a planning committee firstly suggested using building materials like corncob. Although the architects disagreed with the idea, they came up with other creative solutions: Wood siding was taken from the trees grown in the school yard that were suffering from a disease, and rainwater was collected in an old railway car and pumped back into the house to clean the toilets.
All in all, the dorm uses nearly two-thirds less electricity than a similar-sized traditional building would. But even the most sustainable homes need continued efforts from its livers. And in the case of EcoDorm, students live by their words. Most also take advantage of the dorm’s bio-garden, planting and harvesting fruits and vegetables. “I didn’t have to worry about paper towels being wasted or feel bad about drying my clothes outside,” Jeremy Lekich, the dorm’s gardener, said. “Basically, it has made my life easier.”
小題1:We can learn from the text that the EcoDorm in the US     .
A.offers students the chances to have a natural living at college
B.was firstly built by two college students
C.was designed for saving building materials
D.is only applicable in few schools
小題2:The second paragraph is mainly about     .
A.where the EcoDorm was built
B.when the EcoDorm got its name
C.what the EcoDorm is made of
D.how the concept of EcoDorm started
小題3:What is the advantage of the EcoDorm?
A.It helps students to enjoy life at college.
B.It saves a lot of money and energy for the college.
C.It makes students study harder.
D.It brings new energy to the college.
小題4:What can be inferred from the text?
A.A long-term development calls for students’ efforts.
B.Students’ ideas should be encouraged at college.
C.Green living is a new trend at American colleges.
D.Students can learn to protect the environment through practice.

查看答案和解析>>

科目:高中英語 來源:不詳 題型:閱讀理解

One might expect that the ever­growing demands of the tourist trade would bring nothing but good for the countries that receive the holiday­makers. Indeed, a rosy picture is painted for the long­term future of the holiday industry. Every month sees the building of a new hotel somewhere. And every month another rock­bound Pacific island is advertised as the ‘last paradise(天堂) on earth’.
However, the scale and speed of this growth seem set to destroy the very things tourists want to enjoy. In those countries where there was a rush to make quick money out of sea­side holidays, over­crowded beaches and the concrete jungles of endless hotels have begun to lose their appeal.
Those countries with little experience of tourism can suffer most. In recent years, Nepal set out to attract foreign visitors to fund developments in health and education. Its forests, full of wildlife and rare flowers, were offered to tourists as one more untouched paradise. In fact, the nature all too soon felt the effects of thousands of holiday­makers traveling through the forest land. Ancient tracks became major routes for the walkers, with the consequent exploitation of precious trees and plants.
Not only can the environment of a country suffer from the sudden growth of tourism. The people as well rapidly feel its effects. Farmland makes way for hotels, roads and airports; the old way of life goes. The one­time farmer is now the servant of some multi­national organization; he is no longer his own master. Once it was his back that bore the pain; now it is his smile that is exploited. No doubt he wonders whether he wasn't happier in his village working his own land.
Thankfully, the tourist industry is waking up to the responsibilities it has towards those countries that receive its customers. The protection of wildlife and the creation of national parks go hand in hand with tourist development and in fact obtain financial support from tourist companies. At the same time, tourists are being encouraged to respect not only the countryside they visit but also its people.
The way tourism is handled in the next ten years will decide its fate and that of the countries we all want to visit. Their needs and problems are more important than those of the tourist companies. Increased understanding in planning world­wide tourism can preserve the market for these companies. If not, in a few years' time the very things that attract tourists now may well have been destroyed.
小題1:What does the author indicate in the last sentence of Paragraph 1?
A.The Pacific island is a paradise.
B.The Pacific island is worth visiting.
C.The advertisement is not convincing.
D.The advertisement is not impressive.
小題2:The example of Nepal is used to suggest ________.
A.its natural resources are untouched
B.its forests are exploited for farmland
C.it develops well in health and education
D.it suffers from the heavy flow of tourists
小題3:What can we learn about the farmers from Paragraph 4?
A.They are happy to work their own lands.
B.They have to please the tourists for a living.
C.They have to struggle for their independence.
D.They are proud of working in multi­national organizations.
小題4:Which of the following determines the future of tourism?
A.The number of tourists.
B.The improvement of services.
C.The promotion of new products.
D.The management of tourism.
小題5:The author's attitude towards the development of the tourist industry is ________.
A.optimisticB.doubtful
C.objective D.negative

查看答案和解析>>

同步練習(xí)冊答案
国产最顶级的黄色片在线免费观看| 色哟哟亚洲精品一区二区| 亚洲精品www久久久久久广东| 亚洲欧美制服综合另类| xxxxx91麻豆| 日韩av免费看网站| yy111111少妇影院日韩夜片| 亚洲黄色一区二区三区| 日本午夜激情视频| 中文字幕一二三区| 日韩av网站在线播放| av片免费观看| 一本一道dvd在线观看免费视频| 蜜桃视频在线观看免费视频网站www| 日韩深夜视频| 另类图片第一页| 极品中文字幕一区| 成人视屏免费看| 亚洲影视在线观看| 日韩一区二区三区观看| 久久色在线播放| 国产日韩欧美电影在线观看| 日韩av影视| 亚洲这里只有精品| 日本女人性生活视频| 亚洲一区精品在线观看| 免费在线超碰| 国产a亚洲精品| 俺要去色综合狠狠| 蜜乳av一区二区三区| 国产精品萝li| 正在播放亚洲一区| 欧美人在线视频| 国产乱码精品一区二区三区卡| 成人在线免费观看网址| 极品白嫩的小少妇| 国产成人啪精品午夜在线观看| 黄色一级大片在线免费看国产一| 国产黄色小视频在线| 18国产精品| 亚洲综合不卡| 国产精品欧美精品| 日韩精品一区二区三区在线观看 | 老头吃奶性行交视频| 无码一区二区三区在线| 这里只有精品国产| 在线观看二区| jazzjazz国产精品麻豆| 日韩av成人高清| 综合av第一页| 日韩精品视频中文在线观看| 国产精品91免费在线| 国产精品啪啪啪视频| 国产精品久久AV无码| 中文字幕免费观看视频| 久久综合网导航| 欧美亚洲大陆| 国产乱码精品1区2区3区| 图片区小说区国产精品视频| 最近2019中文字幕第三页视频| 操人视频欧美| 亚欧激情乱码久久久久久久久| 538精品在线观看| 一不卡在线视频| 99精品视频在线免费播放| 中文精品在线| 亚洲精品欧美综合四区| 在线看片第一页欧美| 国产精品国产亚洲精品看不卡15| 99免费视频观看| 日韩久久精品视频| 一级毛片视频在线| 久久av资源| 91影院在线观看| 精品乱人伦一区二区三区| 国产精品视频网| 91av俱乐部| 丁香六月婷婷综合| 欧美人与动牲性行为| 久久美女视频| 中文一区二区在线观看| 在线看日韩欧美| 日韩欧美一区二区在线观看| 无码一区二区精品| 少妇高潮一区二区三区99小说| 精品久久久网| 精彩视频一区二区三区| 欧美三级在线播放| 国产精品手机播放| 污片在线免费看| 亚洲字幕av一区二区三区四区| 超碰激情在线| 亚洲欧美日韩精品一区二区| 精品久久久久久中文字幕一区奶水 | 内射后入在线观看一区| 日韩电影精品| 国产呦萝稀缺另类资源| 69堂亚洲精品首页| 亚洲欧洲日本在线| 136导航精品福利| 精油按摩中文字幕久久| 欧美精品丝袜久久久中文字幕| 国产精品一区二区三区久久| 亚洲国产高清av| 在线中文字幕网站| 成人精品高清在线视频| 老色鬼精品视频在线观看播放| 欧美日韩美少妇| 亚洲精品日韩激情在线电影| 国产调教打屁股xxxx网站| 成人小说亚洲一区二区三区| 精品视频91| 成人黄色大片在线观看| 精品无码久久久久久国产| 日韩一区二区三区高清| 免费精品在线视频| av网站大全在线| 亚洲欧美大片| 欧美日韩电影在线| 痴汉一区二区三区| 永久免费毛片在线观看| 五月天婷婷在线视频| 黄色亚洲精品| 欧美人xxxx| 久久亚洲国产精品日日av夜夜| 久久久久久久毛片| 蜜桃视频网站在线观看| 影音先锋中文字幕一区二区| 欧美性猛片aaaaaaa做受| 97视频中文字幕| 91成年人网站| 看黄网站在线| 三级一区在线视频先锋 | 亚洲成人xxx| 亚洲看片网站| 91精品国产乱码在线观看| 成人免费影院| 不卡av在线免费观看| 日韩在线观看免费| 99草草国产熟女视频在线| 午夜精品久久久久久久99热黄桃 | 日本一级淫片色费放| 波多野结衣久久精品| 国产精品一区二区黑丝| 中文字幕亚洲欧美在线| av观看免费在线| 人人妻人人澡人人爽精品日本| 狠狠色丁香婷婷综合影院| 亚洲第一搞黄网站| 97视频资源在线观看| 手机在线免费看片| 免费观看亚洲| 久久综合久久鬼色| 欧美亚洲另类制服自拍| 欧类av怡春院| av网站网址在线观看| 韩国v欧美v日本v亚洲v| 日韩在线视频线视频免费网站| 国产精品无码av无码| 在线视频99 | 你微笑时很美电视剧整集高清不卡| 一区二区三区毛片| 亚洲一区二区三区777| 日韩av片在线免费观看| 忘忧草在线影院两性视频| 成人av一区二区三区| 午夜精品一区二区三区在线| 污污内射在线观看一区二区少妇| 黄网站在线免费| 国产乱人伦偷精品视频不卡| 欧美猛男性生活免费| 国产精品一级无码| av网址在线| 成人免费毛片aaaaa**| 97国产精品视频| 久久久久久亚洲中文字幕无码| 2021天堂中文幕一二区在线观| 成人av网站免费| 欧美洲成人男女午夜视频| 国产三级av在线播放| 成人av观看| 国产精品免费久久久久| 91久久伊人青青碰碰婷婷| 日韩 欧美 精品| 精品网站aaa| 欧美在线啊v一区| 中文字幕av日韩精品| 亚洲免费黄色片| 中文亚洲免费| 日韩中文字幕视频在线观看| www.com日本| 正在播放日韩精品| 综合av第一页| 欧美日韩视频在线一区二区观看视频| 中国一区二区视频| 欧美一区高清| 亚洲午夜精品久久久久久性色| 天堂中文av在线| gogo高清在线播放免费| 中文字幕不卡三区| 国产精品一区二区不卡视频| 亚洲一区二区三区高清视频| 你懂的国产精品| 亚洲午夜国产成人av电影男同| 亚洲女人在线观看| 蜜桃麻豆影像在线观看| 亚洲美女淫视频| 亚洲国产精品一区二区第四页av| 风流老熟女一区二区三区| 欧美亚洲在线| 欧美精品久久久久久久久| 国产又粗又长又黄的视频| 国产精品自在线拍| 91精品国产欧美一区二区18| 成人在线激情网| 狂野欧美性猛交xxxxx视频| 综合欧美一区二区三区| 日韩区国产区| 在线观看黄色片| 国产盗摄女厕一区二区三区| 国产日韩欧美中文| 特级西西444www大胆免费看| 激情久久久久久| 欧美精品日韩www.p站| 久艹在线观看视频| 国产精品三级| 亚洲美女av在线| 成人h动漫精品一区| 秋霞一区二区三区| 3d动漫精品啪啪一区二区竹菊| 91香蕉视频污版| 欧美激情20| 色诱亚洲精品久久久久久| 337p粉嫩大胆噜噜噜鲁| 三级资源在线| 亚洲一区二区精品视频| 国产情侣第一页| 国产三级在线播放| 一区二区三区免费| 福利视频一区二区三区四区| 国产激情在线视频| 亚洲精品日日夜夜| 97中文字幕在线| 欧美野外wwwxxx| 精品久久久久久中文字幕一区奶水 | 国产精品字幕| 欧美三级视频在线观看| www.色就是色.com| 91精品麻豆| 精品国产乱码久久久久久老虎| 日韩无码精品一区二区| 超碰在线亚洲| 国产午夜精品视频| 国精产品一区一区| 日韩高清欧美| 欧美精品videos| 69亚洲精品久久久蜜桃小说| 久久中文在线| 成人午夜在线视频一区| 亚洲精品成人电影| 99久久99久久久精品齐齐| 日本一区二区在线视频| 高清av电影在线观看| 成人免费在线观看入口| 九九热只有这里有精品| 久久久久久久色| 不卡的免费av| 久久一区国产| eeuss一区二区三区| 中文字幕在线永久在线视频| 国产精品视频观看| 国产 日韩 亚洲 欧美| 欧亚av在线| 欧美日韩精品专区| 国产老熟女伦老熟妇露脸| 国内亚洲精品| 国模吧一区二区三区| 免费一级a毛片| 国产精品一区二区三区99| 欧美重口乱码一区二区| 亚洲成人三级| 色婷婷av一区二区三区软件| 97中文字幕在线观看| 亚洲小说图片视频| 欧美激情videos| 中文字幕日日夜夜| 成人永久免费视频| 五月天色婷婷综合| 日韩精品美女| 亚洲国模精品私拍| 国产精品白嫩白嫩大学美女| 免费在线成人| 蜜桃麻豆91| 亚洲精品白浆| 日韩一区二区精品葵司在线| 97精品在线播放| 老司机精品视频网站| 精品国产乱码久久久久久88av| 在线a免费看| 欧美日本韩国一区二区三区视频| 成人免费毛片糖心| 激情综合久久| 精品国产乱码久久久久久蜜柚| 国产在线一区二区视频| 欧美女孩性生活视频| 懂色av粉嫩av蜜臀av一区二区三区| av成人天堂| 欧洲成人一区二区| 欧美激情护士| 国产午夜精品全部视频播放| 免费av中文字幕| 26uuu亚洲| 国产激情在线观看视频| 偷拍一区二区| 日韩免费在线观看视频| 午夜cr在线观看高清在线视频完整版| 精品免费在线观看| 性久久久久久久久久| 亚洲精选成人| 日产中文字幕在线精品一区| 成人一区福利| 精品国产一区二区三区在线观看| 艳妇乳肉豪妇荡乳av| 国产精品丝袜一区| 91丨porny丨九色| 亚洲精品一区二区在线看| 成人欧美一区二区三区在线观看| 菠萝蜜视频国产在线播放| 亚洲成色777777女色窝| 亚洲色成人www永久网站| 久久这里只有精品6| 国产传媒免费观看| 亚洲精品小说| 鲁丝一区二区三区免费| 手机看片久久| 九色精品免费永久在线| 成人xxxx| 欧美视频中文字幕| 欧美精品色哟哟| 99在线热播精品免费| 天天色综合社区| 欧美日韩精品一本二本三本| 欧美一区1区三区3区公司| 日韩大陆av| 91国产在线精品| 成人影视在线播放| 欧美白人最猛性xxxxx69交| 人人草在线观看| 亚洲精选视频在线| 男人操女人动态图| 国产在线不卡视频| 亚洲精品乱码久久久久久自慰 | 少妇激情av一区二区| 91精品免费观看| 一区二区视频网站| 一区二区在线电影| 色www亚洲国产阿娇yao| 国产91综合网| 久久久久久久久久毛片| 国产美女一区| 奇米影视亚洲色图| 色婷婷综合网| 日韩亚洲一区在线播放| 中文字幕日韩高清在线| 91在线视频成人| 日韩中文影院| 欧洲亚洲在线视频| 亚洲七七久久综合桃花剧情介绍| 日韩在线精品视频| 欧美女同网站| 亚洲天堂日韩电影| 在线视频专区| 亚洲精品v欧美精品v日韩精品| 人妻91麻豆一区二区三区| 欧美乱妇一区二区三区不卡视频| 日韩久久久久久久久久| 五月婷婷激情综合| 好吊操这里只有精品| 亚洲视频在线观看三级| 性欧美疯狂猛交69hd| 国产日韩三级在线| 成人在线观看免费高清| 91蝌蚪porny九色| 深爱五月激情网| av在线综合网| 高清国产在线观看| 91年精品国产| 欧美老女人性生活视频| 国产日韩欧美一区二区三区乱码| 久久美女免费视频| 久久午夜色播影院免费高清| 国产熟妇久久777777| 久久综合久久99| 国产白丝一区二区三区| 国产女主播一区| 免费成年人视频在线观看| 中文字幕一区二区三| 青青草原在线免费观看视频| 中文字幕人成不卡一区| 国产真实乱人偷精品视频|