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

DNA left at a crime scene could be used in the future to build up a picture of an offender’s face, it was revealed tonight.
A first step towards genetic mugshots has been taken by researchers in the US who link specific DNA markers with face shape. To identify the genes, they focused on known mutations(突變) that cause changes of the face and head. Normal versions of these genes were found to influence individual features. For instance, one gene affected the lips, another the shape and configuration of bones around the eyes, and a third the appearance of the mid-face and skull. In total, 20 genes had “significant effects” on facial appearance.
Lead scientist Professor Mark Shriver, from Pennsylvania State University, said: “We use DNA to match to an individual or identify an individual, but you can get so much more from DNA. Currently we can’t go from DNA to a face, or from a face to DNA, but it should be possible.” The implications are far reaching, raising the possibility of creating a data bank of facial types based on genetic markers. DNA from a crime scene could then be used to produce a rough image of the face of an offender or victim. Such genetic mugshots may be more reliable than computer-generated “e-fits” based on witnesses’ recollections. Other uses of the technique might include proving the identity of fathers in paternity cases, or visualising our remote ancestors from fossil DNA.
The scientists wrote in the online journal Public Library of Science Genetics: “Such predictive modelling could be forensically useful; for example, DNA left at crime scenes could be tested and faces predicted in order to help to narrow the pool of potential suspects. Further, our methods could be used to predict the facial features of descendants, deceased ancestors, and even extinct human species. In addition, these methods could prove to be useful diagnostic tools.” The team developed a model which first established a range of physical face shapes from people of mixed West African and European ancestry from the US, Brazil and Cape Verde. Measurements were taken of thousands of point co-ordinates on grids placed over 3D images of the faces.
Statistical methods were then used to determine the relationship between facial differences and the effects of gender, ethnic ancestry and individual gene variants.
小題1:The underlined word “mugshots” in the second paragraph most probably means _________.
A.different facesB.characteristicsC.pictures of faces D.genders
小題2:What can be inferred from the passage?
A. DNA has been used to build up a picture of an offender’s face.
B. It may be much easier to catch criminals with the help of DNA.
C. In all, 20 genes had “significant effects” on facial appearance.
D. One gene can affect more than one part of your face.
小題3:According to Professor Mark Shriver, we know_________.
A.they can merely match to an individual or identify an individual
B.there is a possibility of going from DNA to a face
C.DNA could be used to produce a rough image of an offender’s face
D.this technology is more reliable than computer-generated “e-fits”
小題4:What is the most possible title of the passage?
A.Creating a data bank of DNA
B.Recognizing the DNA of criminals
C.Predicting the location of offence using DNA
D.Building image of offender’s face from DNA

小題1:C
小題2:B
小題3:B
小題4:D

試題分析:文章介紹最近的一項(xiàng)調(diào)查發(fā)現(xiàn),未來可以通過DNA繪制人的臉,這些研究可以用于盡快的尋找嫌疑人,也可以用于識別人的父親和祖先。
小題1:猜詞題:根據(jù)文章第一段的句子:DNA left at a crime scene could be used in the future to build up a picture of an offender’s face, it was revealed tonight.可知第二段的句中提到的mugshots就是第一段提到的“人臉的圖像”,選C。
小題2:推理題:根據(jù)文章第四段的句子:DNA left at crime scenes could be tested and faces predicted in order to help to narrow the pool of potential suspects.可知在DNA的幫助下抓住嫌疑犯可能更加容易,選B
小題3:細(xì)節(jié)題:根據(jù)文章第三段的句子:Lead scientist Professor Mark Shriver, from Pennsylvania State University, said: “We use DNA to match to an individual or identify an individual, but you can get so much more from DNA. Currently we can’t go from DNA to a face, or from a face to DNA, but it should be possible.”可知Professor Mark Shriver認(rèn)為從DNA到一張臉是有可能的,選 B
小題4:主旨題:根據(jù)文章第一段的句子:DNA left at a crime scene could be used in the future to build up a picture of an offender’s face, it was revealed tonight.可知這篇文章介紹的是一個研究發(fā)現(xiàn):可以通過研究DNA繪制疑犯的臉,選D
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

Parents feel that it is difficult to live with teenagers. Then again, teenagers have        feelings about their parents, saying that it is not easy living with them. According to a recent research, the most common         between parents and teenagers is that regarding untidiness and daily routine tasks. On the one hand, parents go mad over         rooms, clothes thrown on the floor and their children’s refusal to help with the        . On the other hand, teenagers lose their patience continually when parents blame them for         the towel in the bathroom, not cleaning up their room or refusing to do the shopping at the supermarket.
The research, conducted by St. George University, shows that different parents have different          to these problems. However, some approaches are more         than others. For example, those parents who yell at their children for their untidiness, but         clean the room for them, have fewer chances of changing their children’s        . On the contrary, those who let teenagers experience the         of their actions can do better. For example, when teenagers who don’t help their parents with the shopping don’t find their favorite drink in the refrigerator, they are forced to         their actions.
Psychologists say that       is the most important thing in parent-child relationships. Parents should      to their children but at the same time they should lend an ear to what they have to say. Parents may       their children when they are untidy but they should also understand that their room is their own private space. Communication is a two-way process. It is only by listening to and       each other that problems between parents and children can be settled.
小題1:
A.naturalB.strongC.guiltyD.similar
小題2:
A.interestB.a(chǎn)rgumentC.linkD.knowledge
小題3:
A.noisyB.crowdedC.messyD.locked
小題4:
A.homeworkB.houseworkC.problem D.research
小題5:
A.washing B.using C.dropping D.replacing
小題6:
A.a(chǎn)pproaches B.contributions C.introductions D.a(chǎn)ttitudes
小題7:
A.complex B.popular C.scientific D.successful
小題8:
A.later B.deliberately C.seldom D.thoroughly
小題9:
A.behavior B.taste C.future D.nature
小題10:
A.failures B.changes C.consequencesD.thrills
小題11:
A.defend B.delay C.repeat D.reconsider
小題12:
A.communicationB.bond C.friendship D.trust
小題13:
A.reply B.a(chǎn)ttend C.a(chǎn)ttach D.talk
小題14:
A.hate B.scold C.frighten D.stop
小題15:
A.loving B.observing C.understanding D.praising

查看答案和解析>>

科目:高中英語 來源:不詳 題型:完形填空

I once worked in a charter school(特許公立學(xué)校).There students with serious problems were put in ___ .So when the year ended in May,only ____students sitting in the classes had been there since the doors____ in August.
Chad was one of them.He started out in my first semester ___ class.He had taken the course twice already ____ earning a credit(學(xué)分),which was ____ at the school.He was too excited at times but fairly bright,and he never ____ a day of school during the first  semester.Chad earned credit for first semester Spanish and moved on to the second.
I noticed a huge ____ in him when he returned from Christmas vacation.He was quieter and worked harder.I was ____ by his big improvement.Towards the end of the spring semester,Chad missed several weeks of school.When he returned.He told me he was soon being sent to “year­round school”.
I ____ the “year­round school” was prison.I was _____ to learn that he had broken into someone's house.____ I wanted to give him an award,some teachers said,“You should give the award to someone else.” I considered it.____ in the end I decided to ____ Chad only on what he had done in my class.
Chad's sentencing had been delayed, and he ____ to school that day.He ___ reacted when I gave him an award for Most Improved.He hugged me ____ and said,“Thank you.Now I have___to show my mom.”
Chad didn't finish second semester Spanish,and he never got ____ for the course.But I'd like to think that ____ made a difference in his life.
小題1:
A.seaB.townC.villageD.prison
小題2:
A.a(chǎn) fewB.manyC.plenty ofD.few
小題3:
A.startedB.closedC.openedD.broke
小題4:
A.EnglishB.ChineseC.SpanishD.Japanese
小題5:
A.withB.withoutC.onD.for
小題6:
A.specialB.usualC.a(chǎn)verageD.common
小題7:
A.ignoredB.missedC.spentD.wasted
小題8:
A.changeB.fearC.troubleD.concern
小題9:
A.confirmedB.puzzledC.preventedD.impressed
小題10:
A.inventedB.recognizedC.discoveredD.realized
小題11:
A.shockedB.pleasedC.frightenedD.terrified
小題12:
A.BeforeB.UntilC.UnlessD.When
小題13:
A.ThenB.ButC.ThusD.Even
小題14:
A.rewardB.determineC.judgeD.defend
小題15:
A.made itB.got itC.went itD.caught it
小題16:
A.excitedlyB.slowlyC.normallyD.hardly
小題17:
A.looselyB.tightlyC.unwillinglyD.narrowly
小題18:
A.everythingB.a(chǎn)nythingC.somethingD.nothing
小題19:
A.creditB.honourC.supportD.bond
小題20:
A.incidentB.a(chǎn)wardC.sentenceD.hug

查看答案和解析>>

科目:高中英語 來源:不詳 題型:閱讀理解

New findings from Queen’s University biologists show that in the plant world, bigger isn’t necessarily better.
“Until now most of the thinking has suggested that to be a good competitor in the forest, you have to be a big plant,” says Queen’s Biology professor Lonnie Aarssen. “But our research shows it’s virtually the other way around.”
Previous studies showed that larger plant species monopolize(壟斷) sunlight, water and other resources, limiting the number of smaller plant species that can exist around them. But the research has proved that this is not generally the case in natural vegetation.
In the Queen’s project, PhD student Laura Keating targeted the largest “host plants” of 16 woody plant species growing in the Okanogan Valley, British Columbia. The research team calculated the number and variety of plants that neighbored each large host plant. They then randomly selected plots without host plants and calculated the plant species there as well. The research showed that the massive trees have no effect on the number of species with which they coexist.
Smaller plants have many advantages over their overbearing neighbors, Professor Aarssen notes. Larger species generate physical space niches under their shelters where smaller species grow well. Smaller plants are much more effective than large trees at using available resources. They also produce seeds at a much younger age and higher rate than their bigger counterparts, and settle down much more quickly—thuscompeting with the newly-born plants of larger species.
小題1: What’s the main idea of the text?
A.Smaller plants may have many advantages over their neighbors.
B.In the plant world, the bigger is better than the smaller one.
C.To be a good competitor in the forest, you have to be a small plant.
D.Queen’s University’s students made a new research.
小題2: The underlined word “this” in Para. 3 refers to the view that _____.
A.large and small plants can grow together in harmony
B.larger plant species limit their smaller neighbors’ growth
C.small plant species have their own advantages
D.large and small plant species can never coexist
小題3:What can we learn according to the text?
A.Larger plant species limit the number of smaller ones around them.
B.Smaller plants can limit the number of plant species around them.
C.Smaller plants produce seeds at a higher rate than their bigger counterparts.
D.Larger trees are more effective than small plants at using available resources.
小題4:Which is the CORRECT order in the Queen’s project?
a. Randomly selected plots without host plants and-calculated the plant species.
b. Calculated the number and variety of plants that neighbored each large host plant.
c. Selected the largest individuals or "host plants" of 16 woody plant species.
A.a(chǎn), b, cB.c, b, a
C.b, c, aD.a(chǎn), c, b

查看答案和解析>>

科目:高中英語 來源:不詳 題型:閱讀理解

  Bananas are one of the world’s most important food crops. They are also one of the most valuable exports. Bananas do not grow from seeds. Instead, they grow from existing plants. Bananas are threatened by disease because all the plants on a farm are copies of each other. They all share the same genetic weaknesses. For example, the Cavendish banana is most popular in North American and European markets. However, some kinds of fungus organisms easily infect the Cavendish. Black Sigatoka disease affects the leaves of Cavendish banana plants. The disease is controlled on large farms by putting chemicals on the plants’ leaves. Farmers put anti-fungal chemicals on their crops up to once a week.

Another fungal disease is more serious. Panama disease attacks the roots of the banana plants. There is no chemical treatment for this disease. Infected plants must be destroyed. Panama disease has affected crops in Southeast Asia, Australia and South Africa. There is concern that it may spread to bananas grown in the Americas. This could threaten an important export product for Central and South America.
The International Network for the Improvement of Banana and Plantain supports research on bananas. The group has headquarters in France and other offices in the major banana-growing areas of the world. The group says that more research must be done to develop improved kinds of bananas. The group says that fungal diseases mainly affect only one kind of banana. In fact, there are five hundred different kinds of bananas. Food and Agriculture Organization of the United Nations has said that the Cavendish banana represents only 10% of world production.
The U. N. agency says farmers should grow different kinds of bananas. This protects against diseases that affect only one kind. Experts warn that disease may cause the Cavendish banana to disappear. This happened earlier to another popular banana because of its genetic weakness against disease.
小題1:What does this passage mainly tell us?
A.Bananas are the world’s most important food crops.
B.The risk to a popular banana shows need to grow other kinds.
C.There are five hundred different kinds of bananas.
D.How to grow bananas in different countries.
小題2:Bananas are threatened by disease because   .
A.they grow from seeds
B.they are one of the most valuable exports
C.the only way to prevent it is to put chemicals on their leaves
D.they have genetic weaknesses against disease
小題3: Panama disease   .
A.doesn’t belong to fungal disease
B.a(chǎn)ffects the leaves of banana plants
C.destroys bananas more seriously than Black Sigatoka disease
D.has spread to bananas all over the world
小題4: We can infer from Paragraph 3 that   .
A.the center of the group is in the US
B.the Cavendish banana covers only a small part of the yield of bananas
C.the key to solving the disease is to research all kinds of bananas
D.each fungal disease affects five hundred different kinds of bananas

查看答案和解析>>

科目:高中英語 來源:不詳 題型:閱讀理解

There are many things that go into making a successful school, and success can be measured in many ways. Often, the teachers are praised for a school’s success and blamed for its failure. Yet, in order for a school to be effective, it must be a place where teaching and learning can easily take place, and that requires the hard work of more than just educators. Students must take learning into their own hands and feel as if what they are doing is as important as it actually is. This can only be done with the cooperation of every adult that is involved in the students’ life. Some of these individuals often go unnoticed, yet the role they play in the students’ lives is immeasurable.
Administrative assistants welcome students at the beginning of the day and answer a large number of questions. When an assistant remembers a student’s name or even something special about that student, it communicates to him that he is cared for. The assistant can also give that extra encouragement for a student to make better choices, especially when they are visiting the principal’s office.
Cafeteria workers have a short period of time to interact with students, but can make a big difference as well. Beyond meeting nutritional needs, cafeteria workers may also on occasion meet the emotional needs of the students they serve. Students benefit from positive interaction with adults, and cafeteria workers may give that extra bit of encouragement that a child needs.
Custodians (管理人員) are often underappreciated for all that they give to schools. They have to be knowledgeable about everything from cleaning to fixing the most intricate (復(fù)雜的) tools. They get to school early in the morning before teachers arrive and lock up late at night after the last student has left from the after-school event. They also make sure teachers are equipped with the necessary items and prepare the rooms so that they are ready for learning. A great custodian also gives that kind word or extra smile to that student who needs it most.
小題1:If an assistant remembers a student’s name, the student will feel that       .
A.he is cared for
B.he is special
C.he has done something wrong
D.he has made progress in study
小題2:Which of the following is TRUE about cafeteria workers?
A.It’s enough for them to cook for the students.
B.It’s hard for them to interact with the students.
C.They can also meet the emotional needs of the students.
D.They have the most interaction with students at school.
小題3:We learn from the fourth paragraph that       .
A.custodians play the least important role in a school
B.the work of custodians often goes unnoticed
C.custodians should be more serious with students
D.custodians’ work is always appreciated at school
小題4:How does the author feel about the staff mentioned in the text?
A.Disappointed. B.Appreciative.
C.Dissatisfied. D.Doubtful.

查看答案和解析>>

科目:高中英語 來源:不詳 題型:閱讀理解

DAVID Beckham. Cristiano  Ronaldo and Rnfacl Nadal while you watch sports and admin* the players’ skills, do you ever notice how handsome the players are?
Yes, sportsmen tend to be handsome. And they haven’t only attracted the interest of the audience even scientists are now studying their good looks.
In a recent study, Erik Postma, a biologist at the University of Zurich in Switzerland, collected the headshots(頭像)of 80 professional athletes from I hr 2012 Tour He France, a bicycle race held in Franco. The race, which covers 3,200 kilometers in 23 days, is often considered to In* one of the hardest endurance(耐力)events, according to The Telegraph.
Postma then asked female participants to score the cyclists’ attractiveness.judging them only based on their facial appearances. So, if a participant recognized any of the cyclists, meaning she knew how good he was at the sport, her score wouldn’t count.
After comparing all the scores with the cyclists’ performances in the 2012 race, Postma was surprised to find that the best riders were rated on average 25 percent more attractive than the worst ones. For example, one of the cyclists, Maxime Monfort , came third in terms of attractiveness and sixth in terms of performance, reported Discovery News.
But where did women get the ability to single out a good rider by simply looking at his face?
According lo Postma, evolution (進(jìn)化) seems to be the answer. In ancient times, women preferred to marry strong men because they would provide good genes for their children. A man with great endurance was also able to cover long distances to hunt for food, which would allow him to better feed the family. “That’s why endurance performance was a key evolutionary factor.” Postma told Discovery News.
As you can see, it’s not that sportsmen ate more attractive themselves, women were just born to think of them that way.
Perhaps surprisingly, when Postma did the same test with male participants, he found that men actually had a quite similar view on which riders were handsome. Even
though most men aren’t aware of it. they inherited (繼承) this ability from their ancient past, when it was necessary to “spot potential competitors” , explained Postma.
小題1:What did Erik Postma ask female participants to do in his study?
A.To help collect the headshots of professional cyclists from the Tour de France.
B.To pick out the cyclists whom they are familiar with or appreciate most.
C.To rate the cyclists’ attractiveness according to facial appearance.
D.To predict the cyclists ’ performances based on facial appearance.
小題2:What did Postma discover from his study?
A.The more attractive a cyclist was, the better he performed in the race.
B.Generally, a cyclist’s endurance had nothing to do with his attractiveness.
C.Attractive cyclists proved to have less endurance than those who were less attractive.
D.Those who performed best in the games were considered more attractive than those who performed worst.
小題3:What can we conclude from the last three paragraphs?
A.Women and men hold quite different views on male attractiveness.
B.Men with good looks tend to lie less popular than men with great endurance.
C.A man with great endurance appealed to women in ancient times and this remains the same today.
D.Most men don* t have the same ability as women to single out a good sportsman by simply looking at his face.

查看答案和解析>>

科目:高中英語 來源:不詳 題型:閱讀理解

Schooling Matters
March 25, 2014  Chengdu  Michelle Obama
You see, the truth is that I grew up like many of you. My mom, my dad, my brother and I, we lived in a tiny apartment in Chicago, which is one of the largest cities in America. My father worked at the local water plant…
While we certainly weren’t rich, my parents had big dreams for me and my brother. They had only a high school education themselves, but they were determined to send us both to universities.
So they poured all of their love and all of their hope into us, and they worked hard. They saved every penny. And I know that wasn’t easy for them, especially for my father. You see, my father had serious illness called multiple sclerosis(多發(fā)性硬化癥). And as he got sicker, it got harder for him to walk, and it took him longer to get dressed in the morning.
But no matter how tired he felt, no matter how much pain he was in, my father hardly ever missed a day of work, because he was determined to give me and my brother a better life. And every day, like so many of you, I felt the weight of my parents’ sacrifices on my shoulders. Every day, I wanted to make them proud.
So, while most American kids attend public schools near their homes, when it was time for me to attend high school, I took an exam and got into a special public high school where I could get a better education. But the school was very far from my home, so I had to get up early every morning and ride a bus for an hour, sometimes an hour and a half if the weather was bad. And every afternoon, I’d ride that same bus back home and then immediately start my homework, often studying late into the night – and sometimes I would wake up at 4:30 or 5:00 in the morning to study even more.
And it wasn’t easy. But whenever I got tired or discouraged, I would just think about how hard my parents were working for me. And I would remember something my mother always told me – she said, “A good education is something that no one can take away from you.”
小題1:The passage can be sorted as a        
A.self-introductionB.short storyC.news reportD.speech draft (草稿)
小題2:Which of the following is TRUE about Michelle Obama and her family?
A.Her parents were poor but had good educational backgrounds.
B.She attended a public high school near her home.
C.Her father suffered a serious disease and became disabled.
D.She was aware of her parents’ sacrifices and expectations.
小題3:Which of the following words best describes Michelle’s father?
A.Optimistic.B.Humorous.C.Strong-mindedD.Generous
小題4:What does Michelle mainly want to tell readers in this excerpt?
A.We should work hard and get good educations.
B.Our parents always have high expectations for us.
C.She is an ordinary person from an ordinary family.
D.The road to the US First Lady is not easy.

查看答案和解析>>

科目:高中英語 來源:不詳 題型:閱讀理解

The $11 billion self-help industry is built on the idea that you should turn negative thoughts like “I never do anything right” into positive ones like “I can succeed”. But was positive thinking advocate Norman Vincent Peale right? Is there power in positive thinking?
Researchers in Canada just published a study in the journal Psychological Science that says trying to get people to think more positively can actually have the opposite effect: it can simply highlight how unhappy they are.
The study's authors, Joanne Wood and John Lee of the University of Waterloo and Elaine Perunovic of the University of New Brunswick, begin by citing (引證) older research showing that when people get feedback which they believe is overly positive, they actually feel worse, not better. If you tell your friend who is slow to learn that he has the potential of an Einstein, you’re just underlining his faults. In one 1990s experiment, a team including psychologist Joel Cooper of Princeton asked participants to write essays against funding for the disabled. When the essayists were later praised for their sympathy, they felt even worse about what they had written.
In this experiment, Wood, Lee and Perunovic measured 68 students’ self-esteem (自尊). The participants were then asked to write down their thoughts and feelings for four minutes. Every 15 seconds, one group of students heard a bell. When it rang, they were supposed to tell themselves, “I am lovable.”
Those with low self-esteem didn’t feel better after the forced self-affirmation (自我肯定). In fact, their moods turned significantly darker than those of members of the control group, who weren’t urged to think of positive thoughts.
The paper provides support for newer forms of psychotherapy (心理治療) that urge people to accept their negative thoughts and feelings rather than fight them. In the fighting, we not only often fail but can make things worse. Meditation (靜思) techniques, in contrast, can teach people to put their shortcomings into a larger, more realistic viewpoint. Call it the power of negative thinking. 
小題1:The first paragraph is written _________.
A.to raise an argument about positive thinking
B.to introduce the power of positive thinking
C.to encourage people to have positive thoughts
D.to introduce the $11 billion self-help industry
小題2:According to the study of the Canadian researchers, _________.
A.positive thinking is not as powerful as negative thinking
B.encouraging positive thinking may actually discourage people
C.happy people can think positively while unhappy people can’t
D.getting people to think positively can strengthen their confidence
小題3:What does the underlined sentence in Paragraph 3 mean?
A.You are pointing out the mistakes he has made.
B.You are reminding him that he is not intelligent.
C.You are not taking his mistakes seriously enough.
D.You are showing he has great potential in spite of faults.
小題4:We can learn from the last paragraph that _________.
A.negative feelings must be got rid of
B.there’s no point in thinking positively
C.it doesn’t make sense to think negatively
D.negative thinking is not always negative

查看答案和解析>>
亚洲高清av在线| 成人黄色在线| 日韩电影不卡一区| 理论片日本一区| 亚洲香蕉伊在人在线观| 亚洲欧洲午夜一线一品| 亚洲精品免费一区二区三区| 国产日产欧美视频| 黄色录像一级片| 黄页网站免费在线观看| 成人18视频在线观看| 91久久久久| 亚洲欧美另类小说| 一个色综合导航| 国产精品初高中精品久久| 日韩精品你懂的| 丁香六月婷婷综合| 国产最新在线| blacked蜜桃精品一区| 成人免费视频播放| 91麻豆精品国产无毒不卡在线观看| 欧美一乱一性一交一视频| 2021狠狠干| 亚洲欧美卡通动漫| 在线观看av影片| 日韩激情综合| 国产老妇另类xxxxx| 欧美午夜影院一区| 97色伦亚洲国产| 嫩草影院中文字幕| 疯狂试爱三2浴室激情视频| 水莓100在线视频| 另类春色校园亚洲| 福利视频网站一区二区三区| 日韩亚洲欧美中文三级| 亚洲伊人久久综合| 国产999免费视频| 国产偷拍一区二区| 成人做爰视频www| 蜜桃av一区二区三区电影| 欧美性欧美巨大黑白大战| 国产成人在线视频| wwwwwxxxx日本| 91丨porny丨在线中文| 激情开心成人网| 青青草国产精品97视觉盛宴| 欧美日韩精品福利| 成人免费网视频| 亚洲熟妇一区二区| 亚洲黄色a级片| 99久热这里只有精品视频免费观看| 国产一区二区三区免费观看| 欧美成人免费网站| 久久亚洲高清| www..com.cn蕾丝视频在线观看免费版| 领导边摸边吃奶边做爽在线观看 | 午夜影院免费体验区| 国产专区精品| 久久夜色精品一区| 尤物tv国产一区| 91视频成人免费| 麻豆久久久久久久久久| 国模套图日韩精品一区二区| 日韩激情在线观看| 欧美一区二区日韩一区二区| 国模精品一区二区三区| 国产jjizz一区二区三区视频| 男男电影完整版在线观看| 日韩欧美电影| 伊人夜夜躁av伊人久久| 国产成人黄色av| 中文字幕在线播放一区二区| 在线视频中文字幕| 欧美高清视频手机在在线| 一区二区不卡在线视频 午夜欧美不卡在| 97激碰免费视频| 天天摸天天舔天天操| 日本高清视频免费观看| 国产精品一区2区3区| 亚洲视频在线观看一区| 欧日韩不卡在线视频| 91亚洲精品久久久蜜桃借种| 成人在线观看视频app| 精品国产精品国产偷麻豆| 亚洲综合区在线| 国产精品一区二区久久久久| av在线播放网址| 欧美猛烈性xbxbxbxb| 亚洲永久免费精品| 欧美成人综合网站| 中文字幕制服丝袜在线| 国产精品第5页| 九色精品蝌蚪| 中文字幕一区二区在线观看| 国产99久久久欧美黑人| 插我舔内射18免费视频| 麻豆视频在线观看免费网站| 久久中文欧美| 亚洲偷熟乱区亚洲香蕉av| 中文字幕在线中文| 国产人妻精品一区二区三| 西野翔中文久久精品字幕| 亚洲二区视频在线| 97久久夜色精品国产九色| 99成人在线观看| av综合电影网站| 久久这里都是精品| 91成人福利在线| 国模私拍在线观看| 日本色护士高潮视频在线观看| 美女在线一区二区| 最近2019中文字幕大全第二页| 成人精品视频一区二区| 如如影视在线观看经典| 亚洲激情影院| 亚洲精品狠狠操| 欧美日韩黄色一级片| 视频一区二区免费| 在线欧美不卡| 日韩高清有码在线| 狠狠操精品视频| 欧洲亚洲在线| 免费成人小视频| 久久综合色88| 美女黄色一级视频| 国产盗摄在线视频网站| 久久亚区不卡日本| 国产精品久久久久久久久| 黄色片网站在线播放| aaaa欧美| 亚洲一区在线视频观看| 精品一区二区久久久久久久网站| www欧美在线| 国产精选一区| 91精品欧美一区二区三区综合在| 国产性生活免费视频| 日本xxxx人| 亚洲一区一卡| 久久九九热免费视频| 国产综合内射日韩久| 丁香影院在线| 中文字幕成人网| 国产精品国产精品国产专区蜜臀ah| 国产免费av一区二区| 四虎影视精品| 91精品国产高清一区二区三区 | 国产成人综合欧美精品久久| 亚洲自拍电影| 日韩丝袜美女视频| 妺妺窝人体色www在线小说| 四虎在线观看| 国产在线不卡一卡二卡三卡四卡| 91av在线播放| 亚洲综合网在线| 婷婷综合成人| 精品国产网站在线观看| 手机在线看福利| 国产天堂在线播放视频| 国产精品久久久99| 久久av一区二区| 国产按摩一区二区三区| 亚洲一区网站| 97久久精品在线| 免费中文字幕在线观看| 奇米狠狠一区二区三区| 日韩三级视频在线观看| 亚洲娇小娇小娇小| 国产理论电影在线| 亚洲男同性恋视频| 四虎永久国产精品| 中文字幕一区免费| 国产99久久久久久免费看农村| 国产精品极品在线| 99久久久无码国产精品免费蜜柚| 在线看片不卡| 久久国产精品亚洲| 亚洲女同二女同志奶水| 欧美色图五月天| 精品国产人成亚洲区| 成年人看片网站| 日韩久久一区| 欧美日韩黄色影视| 国产精品视频中文字幕| 亚洲精品mv| 色综合久久久久综合| 免费观看精品视频| 91九色porn在线资源| 无码av免费一区二区三区试看 | 亚洲一区二区三区网站| 香蕉久久夜色精品| 日本久久久久亚洲中字幕| 中国一级特黄毛片| 狠狠色狠狠色综合日日tαg| 色综合久久天天综线观看| 欧美日韩在线国产| 五月开心六月丁香综合色啪| 欧美不卡视频一区发布| 久视频在线观看| 欧美~级网站不卡| 久久久久亚洲精品| 伊人手机在线视频| 亚久久调教视频| 国产精品流白浆视频| 一级片在线免费观看视频| 蜜桃视频在线观看一区二区| 成人黄色免费网站在线观看| a视频免费在线观看| 国产福利一区二区三区在线视频| 国产激情美女久久久久久吹潮| 最新中文字幕av专区| 91丨九色丨蝌蚪丨老版| 亚洲欧洲国产精品久久| 黄色在线论坛| 天天av天天翘天天综合网色鬼国产| 日本www在线播放| 不卡av播放| 欧美日韩午夜在线视频| 不许穿内裤随时挨c调教h苏绵| 99国产精品久久一区二区三区| 亚洲激情电影中文字幕| 国产精品一区二区亚洲| 91tv精品福利国产在线观看| 97香蕉久久超级碰碰高清版| 中文字幕日韩经典| 国产一区三区三区| 欧美激情专区| 香蕉视频在线免费看| 午夜视频在线观看一区二区| 国产精品自拍视频在线| 日韩中文一区二区| 伊人伊成久久人综合网小说| 国产亚洲精品女人久久久久久| 一区二区福利| 亚洲a∨日韩av高清在线观看| 亚洲色图21p| 国产精品久久毛片a| 99精品人妻少妇一区二区 | 美女被艹视频网站| 六月丁香久久丫| 免费99精品国产自在在线| 亚洲图片欧美日韩| 国产一区二区美女诱惑| 手机成人在线| 高清在线视频不卡| 欧美成人性战久久| 欧美激情图片小说| 丝瓜av网站精品一区二区| 国产乱码精品一区二区三区日韩精品 | 精选一区二区三区四区五区| 成人午夜影视| 91国内精品野花午夜精品| xxxxxx黄色| 真实国产乱子伦精品一区二区三区| 国产91在线播放精品91| 96久久久久久| 亚洲国产美国国产综合一区二区| 国产成人美女视频| 国产伦精品一区二区三区视频| 欧美在线不卡区| eeuss一区| 亚洲成人动漫一区| 亚洲天堂2024| 欧美日韩网址| 国产精品久久亚洲| 中文在线观看免费| 精品久久五月天| 日本少妇裸体做爰| 国产成人午夜99999| www.日本在线视频| 久久国际精品| 欧美肥婆姓交大片| 西西人体44www大胆无码| 一区二区三区蜜桃网| www.17c.com喷水少妇| 欧美日韩国产在线一区| 国产成人免费电影| 大片免费在线观看| 精品久久久久久无| 天天做天天爱夜夜爽| 成人动漫av在线| 欧美 日韩 国产一区| 久久365资源| 日韩免费观看网站| 国产在线观看免费网站| 91精品国产手机| 亚欧洲精品在线视频| 成人av电影在线| 波多野结衣作品集| 精品久久久中文字幕| 亚洲xxxxx电影| 在线观看小视频| 精品亚洲一区二区三区在线播放 | 日韩精品――中文字幕| av高清久久久| 中文字幕在线导航| 大色综合视频网站在线播放| 97se在线视频| 三级在线观看视频| 久久久91精品| 中文资源在线网| 欧美日韩国产中文| 日本道在线观看| 中文字幕 久热精品 视频在线| 交换做爰国语对白| aⅴ色国产欧美| 看全色黄大色大片| 精品三级在线观看视频| 国产精品一区久久久| 99热国产在线| 国产亚洲精品久久久久久777| 99久久一区二区| 日韩欧美精品中文字幕| 欧美日韩在线视频免费| 久久新电视剧免费观看| 亚洲AV成人精品| 日韩成人伦理电影在线观看| 日韩在线观看a| 精品久久久久中文字幕小说| 国产欧美一区二区三区另类精品| 欧美gay囗交囗交| 97激碰免费视频| 黄色一级片在线观看| 夜夜嗨av色一区二区不卡| 污污视频在线免费看| 欧美日韩aaaaaa| 中文字幕乱码一区二区| 亚洲国产欧美在线| 免费一级全黄少妇性色生活片| 久久久久久日产精品| 国产精品久久AV无码| 国产一区二区不卡| 91精产国品一二三产区别沈先生| 99pao成人国产永久免费视频| 黄色成人在线免费观看| 色777狠狠狠综合伊人| 欧洲精品一区色| 久久久久久久久久久久久久久久久久久久 | 1024精品视频| 激情欧美亚洲| 亚洲熟妇无码另类久久久| 99久久这里只有精品| 一本色道婷婷久久欧美| 中文字幕伦av一区二区邻居| 免费影院在线观看一区| 国产精品毛片久久久| 国产一区二区免费在线观看| 欧美一级大片在线视频| 成人激情av| 日韩黄色av| 国产一区喷水| 国产图片一区| 欧美日韩一区二区三区在线视频 | 精产国品一区二区| 精品久久久久久久久中文字幕 | 国产精品对白交换视频 | 国产一区二区不卡在线| 久久精品久久99| 国产自产v一区二区三区c| 国产伦精品一区二区三区妓女下载| 麻豆精品精品国产自在97香蕉| 在线观看视频在线观看| 国内精品久久久久影院薰衣草| 欧美性猛交xx| 国产成人精品一区二| 在线视频 日韩| 91视频一区二区三区| 正在播放国产对白害羞| 国产精品欧美综合在线| 精品国产乱码久久久久久鸭王1| 亚洲乱码中文字幕| 中文在线观看免费网站| 精品毛片三在线观看| 亚洲视频在线观看一区二区| 91.com在线观看| 国产无遮挡在线视频免费观看| 精品视频中文字幕| 国产女人在线观看| 色综合男人天堂| 国产激情在线播放| 91精品免费看| 成人免费直播在线| 亚洲欧美日产图| 欧美精品成人| 不卡的av中文字幕| 国产成人aaaa| 精品手机在线视频| 一区二区三区在线视频播放 | 中文无字幕一区二区三区| 久久精品波多野结衣| 欧美性xxxx极品hd满灌| av中文在线观看| 日韩精品中文字幕在线| 在线观看免费高清完整| 欧美在线一级视频| 久久gogo国模啪啪裸体| 亚洲7777| 亚洲毛片av| 又色又爽又黄18网站| 国产亚洲精品超碰| 五月天婷婷丁香|