精品一区二区免费在线观看_国产精品久久久久久av福利软件_97成人精品区在线播放_国内成人精品一区

When people in the U.S. have company or when they're invited to (formal or informal)get-together, they usually make a point of trying to make others feel comfortable and relaxed.On the whole, they tend to be informal. Men shake hands, but usually only when they're introduced. Male friends and business associate who haven't seen each other in a while may shake hands when they say hello. Women usually don't shake hands when being introduced to each other. When a woman and man are introduced, shaking hands is up to the woman. Americans rarely shake hands to say goodbye, except on business occasions. American women are used to being independent. They are used to going to places by themselves, making their own money, and often living alone. Sometimes they will ask men for help, but they usually don't want to be protected. Since the women's movement started, it's not always clear whether women expect men to open doors or help them into their coats. American women may start conversations with men or even ask them to dance.

 There are a lot of Americans who don't smoke or drink, and many who don't want people to do those things in their houses. It's always best to ask for permission before you,bring alcohol to a dinner or before you light up a cigarette, if you are with people you don't ,know very well. Non-smokers have become more militant (好戰(zhàn)的) about smoking in public places. Many restaurants, for example, have set up special areas for smokers.

House guests may bring gifts when they come to visit, and they often offer to help in some way. As a guest, you may want to ask your host or hostess if there's anything you can do to help in the kitchen. In many cases, the gesture is more important than actually helping.

"…the gesture is more important than actually helping." Here "gesture" means_________.

     A. 態(tài)度       B. 話題          C.姿態(tài)         D. 言行

When American people are introduced to each other, ____________.

     A. men seldom shake hands                       B. women often shake hands

     C. a woman decides if she will shake hands with a man

     D. a man decides if he will shake hands with a woman

___________is not mentioned in the passage.

    A. How to visit an American family      B. When American women's movement started

    C. American women are independentD Non-smokers hate smoking in public places.

Which one is NOT right? ________________.

A None of Americans want people to smoke or drink in their houses

B Many Americans don’t smoke or drink

C Many special areas for smokers have been set up in the US

D It’s best to ask before you smoke in America

【小題1】C【小題1】C【小題1】B【小題1】A


解析:

練習(xí)冊系列答案
相關(guān)習(xí)題

科目:高中英語 來源: 題型:閱讀理解

Can people change their skin colour without suffering like pop king Michael Jackson? Perhaps yes. Scientists have found the gene that determines skin colour.

The gene comes in two versions, one of which is found in 99 per cent of Europeans. The other is found in 93 to 100 per cent of Africans, researchers at Pennsylvania State University report in the latest issue of Science.

Scientists have changed the colour of a dark-striped zebrafish to uniform gold by inserting a version of the pigment(色素) gene into a young fish. As with humans, zebrafish skin colour is determined by pigment cells, which contain melanosomes(黑色素). The number, size and darkness of melanosomes per pigment cell determines skin colour.

It appears that, like the golden zebrafish, light-skinned Europeans also have a mutation(變異) in the gene for melanosome production. This results in less pigmented skin.

However, Keith Cheng, leader of the research team, points out that the mutation is different in human and zebrafish genes.

Humans acquired dark skin in Africa about 1.5 million years ago to protect bodies from ultra-violet rays of the sun(太陽光紫外線), which can cause skin cancer.

But when modern humans leave Africa to live in northern latitudes, they need more sunlight on their skin to produce vitamin D. So the related gene changes, according to Cheng.

Asians have the same version of the gene as Africans, so they probably acquired their light skin through the action of some other gene that affects skin colour, said Cheng.

The new discovery could lead to medical treatments for skin cancer. It also could lead to research into ways to change skin colour without damaging it like chemical treatment did on Michael Jackson.

The passage mainly tells us that ________.

  A. people can not change their skin colour without any pain

  B. the new discovery could lead to search into ways to change skin colour safely

  C. pop king Michael Jackson often changed his skin colour as he liked

  D. scientists have found out that people’s skin colour is determined by the gene

It can be inferred from the passage that ________.

  A. nowadays people who want to change their skin colour have to suffer a lot from the damage caused by the chemical  treatment

  B. Europeans and Africans have the same gene

  C. the new discovery could help to find medical treatments for skin cancer

  D. there are two kinds of genes

Scientists have done an experiment on a dark-striped zebra fish in order to ________.

  A. find the different genes of humans’

  B. prove the humans’ skin colour is determined by the pigment gene

  C. find out the reason why the Africans’ skin colour is dark

  D. find out the ways of changing peopl’s skin colour

The writer’s attitude towards the discovery is ________.

  A. neutral                      B. negative                   C. positive                    D. indifferent

查看答案和解析>>

科目:高中英語 來源: 題型:閱讀理解

Can people change their skin colour without suffering like pop king Michael Jackson? Perhaps yes. Scientists have found the gene that determines skin colour.

The gene comes in two versions, one of which is found in 99 per cent of Europeans. The other is found in 93 to 100 per cent of Africans, researchers at Pennsylvania State University report in the latest issue of Science.

Scientists have changed the colour of a dark-striped zebrafish to uniform gold by inserting a version of the pigment(色素) gene into a young fish. As with humans, zebrafish skin colour is determined by pigment cells, which contain melanosomes(黑色素). The number, size and darkness of melanosomes per pigment cell determines skin colour.

It appears that, like the golden zebrafish, light-skinned Europeans also have a mutation(變異) in the gene for melanosome production. This results in less pigmented skin.

However, Keith Cheng, leader of the research team, points out that the mutation is different in human and zebrafish genes.

Humans acquired dark skin in Africa about 1.5 million years ago to protect bodies from ultra-violet rays of the sun(太陽光紫外線), which can cause skin cancer.But when modern humans leave Africa to live in northern latitudes, they need more sunlight on their skin to produce vitamin D. So the related gene changes, according to Cheng.Asians have the same version of the gene as Africans, so they probably acquired their light skin through the action of some other gene that affects skin colour, said Cheng.

The new discovery could lead to medical treatments for skin cancer. It also could lead to research into ways to change skin colour without damaging it like chemical treatment did on Michael Jackson.

The passage mainly tells us that ________.

  A. people can not change their skin colour without any pain

  B. the new discovery could lead to search into ways to change skin colour safely

  C. pop king Michael Jackson often changed his skin colour as he liked

  D. scientists have found out that people’s skin colour is determined by the gene

It can be inferred from the passage that ________.

  A. nowadays people who want to change their skin colour have to suffer a lot from the damage caused by the chemical  treatment                                 B. Europeans and Africans have the same gene

  C. the new discovery could help to find medical treatments for skin cancer    D. there are two kinds of genes

Scientists have done an experiment on a dark-striped zebra fish in order to ________.

  A. find the different genes of humans’

  B. prove the humans’ skin colour is determined by the pigment gene

  C. find out the reason why the Africans’ skin colour is dark  D. find out the ways of changing peopl’s skin colour

The reason why Europeans are light-skinned is probably that ________.

  A. they are born light-skinned people

  B. light-skinned Europeans have mutation in the gen for melanosome production

  C. they have fewer activities outside          D. they pay much attention to protecting their skin

The writer’s attitude towards the discovery is ________.

  A. neutral                      B. negative                   C. positive                    D. indifferent

查看答案和解析>>

科目:高中英語 來源: 題型:閱讀理解

Can people change their skin colour without suffering like pop king Michael Jackson? Perhaps yes. Scientists have found the gene that determines skin colour.

The gene comes in two versions, one of which is found in 99 per cent of Europeans. The other is found in 93 to 100 per cent of Africans, researchers at Pennsylvania State University report in the latest issue of Science.

Scientists have changed the colour of a dark-striped zebrafish to uniform gold by inserting a version of the pigment(色素) gene into a young fish. As with humans, zebrafish skin colour is determined by pigment cells, which contain melanosomes(黑色素). The number, size and darkness of melanosomes per pigment cell determines skin colour.

It appears that, like the golden zebrafish, light-skinned Europeans also have a mutation(變異) in the gene for melanosome production. This results in less pigmented skin.

However, Keith Cheng, leader of the research team, points out that the mutation is different in human and zebrafish genes.

Humans acquired dark skin in Africa about 1.5 million years ago to protect bodies from ultra-violet rays of the sun(太陽光紫外線), which can cause skin cancer.

But when modern humans leave Africa to live in northern latitudes, they need more sunlight on their skin to produce vitamin D. So the related gene changes, according to Cheng.

Asians have the same version of the gene as Africans, so they probably acquired their light skin through the action of some other gene that affects skin colour, said Cheng.

The new discovery could lead to medical treatments for skin cancer. It also could lead to research into ways to change skin colour without damaging it like chemical treatment did on Michael Jackson.

51. The passage mainly tells us that ________.

  A. people can not change their skin colour without any pain

  B. the new discovery could lead to search into ways to change skin colour safely

  C. pop king Michael Jackson often changed his skin colour as he liked

  D. scientists have found out that people’s skin colour is determined by the gene

52. It can be inferred from the passage that ________.

  A. nowadays people who want to change their skin colour have to suffer a lot from the damage caused by the chemical  treatment

  B. Europeans and Africans have the same gene

  C. the new discovery could help to find medical treatments for skin cancer

  D. there are two kinds of genes

53. Scientists have done an experiment on a dark-striped zebra fish in order to ________.

  A. find the different genes of humans’

  B. prove the humans’ skin colour is determined by the pigment gene

  C. find out the reason why the Africans’ skin colour is dark

  D. find out the ways of changing peopl’s skin colour

54. The reason why Europeans are light-skinned is probably that ________.

  A. they are born light-skinned people

  B. light-skinned Europeans have mutation in the gen for melanosome production

  C. they have fewer activities outside

  D. they pay much attention to protecting their skin

55. The writer’s attitude towards the discovery is ________.

  A. neutral                      B. negative                   C. positive                    D. indifferent

查看答案和解析>>

科目:高中英語 來源:20102011學(xué)年福建省四地六校高一下學(xué)期第二次月考英語試題 題型:閱讀理解

Can people change their skin colour without suffering like pop king Michael Jackson? Perhaps yes. Scientists have found the gene that determines skin colour.

The gene comes in two versions, one of which is found in 99 per cent of Europeans. The other is found in 93 to 100 per cent of Africans, researchers at Pennsylvania State University report in the latest issue of Science.

Scientists have changed the colour of a dark-striped zebrafish to uniform gold by inserting a version of  the pigment(色素) gene into a young fish. As with humans, zebrafish skin colour is determined by pigment cells, which contain melanosomes(黑色素). The number, size and darkness of melanosomes per pigment cell determines skin colour.

It appears that, like the golden zebrafish, light-skinned Europeans also have a mutation(變異) in the gene for melanosome production. This results in less pigmented skin.

However, Keith Cheng, leader of the research team, points out that the mutation is dif ferent in human and zebrafish genes.

Humans acquired dark skin in Africa about 1.5 million years ago to protect bodies from ultra-violet rays of the sun(太陽光紫外線), which can cause skin cancer.

But when modern humans leave Africa to live in northern latitudes, they need more sunlight on their skin to produce vit amin D. So the related gene changes, according to Cheng.

Asians have the same version of the gene as Africans, so they pr obably acquired their light skin through the action of some other gene that affects skin colour, said Cheng.

The new discovery could lead to medical treatments for skin cancer. It also could lead to research into ways to change skin colour without damaging it like chemical treatment did on Michael Jackson.

 

1.. The passage mainly tells us that ________.

  A. people can not change their skin colour without any pain

  B. the new discovery could lead to search into ways to change skin colour safely

  C. pop king Michael Jackson often changed his skin colour as he liked

  D. scientists have found out that people’s skin colour is determined by the gene

2.. Scientists have done an experiment on  a dark-striped zebra fish in order to ________.

  A. find the  different genes of humans’

  B. prove the humans’ skin colour is determined by the pigment gene

  C. find out the reason why the Africans’ skin colour is dark

  D. find out the ways of changing peopl’s skin colour

3.. The reason why Europeans are light-skinned is probably that ________.

  A. they are born light-skinned people

  B. light-skinned Europeans have mutation in the gene for melanosome production

  C. they have fewer activities outside

  D. they pay much attention to protecting their skin

 

查看答案和解析>>

科目:高中英語 來源:安徽省期末題 題型:閱讀理解

閱讀理解
     That cold January night, I was growing sick of my life in San Francisco. There I was walking home 
at one in the morning after a tiring practice at the theater. With opening night only a week away, I was 
still learning my lines. I was having trouble dealing with my part-time job at the bank and my acting at 
night at the same time. 
     As I walked, I thought seriously about giving up both acting and San Francisco. City life had become 
too much for me. As I walked down empty streets under tall buildings, I felt very small and cold. I began 
running, both to keep warm and to keep away from any possible robbers. Very few people were still 
out except a few sad-looking homeless peopl e under blankets.
     About a block from my apartment, I heard a sound behind me. I turned quickly, half expecting to 
see someone with a knife or a gun. The street was empty. All I saw was a shining streetlight. Still, the 
noise had made me nervous, so I started to run faster. Not until I reached my apartment building and 
unlocked the door did I realize what the noise had been. It had been my wallet falling to the sidewalk.
     Suddenly I wasn't cold or tired any more. I ran out of the door and back to where I'd heard the 
noise. Although I searched the sidewalk anxiously for fifteen minutes, my wallet was nowhere to be found.
     Just as I was about to give up the search, I heard the garbage truck pull up to the sidewalk next to 
me. When a voice called from the inside , "Alisa Camacho?" I thought I was dreaming. How could this 
man know my name? The door opened, and out jumped a small red-haired man with an amused look 
in his eyes. "Is this what you're looking for?" he asked, holding up a small square shape.
     It was nearly 3 a.m. by the time I got into bed. I wouldn't get much sleep that night, but I had got my 
wallet back. I also had got back some enjoyment of city life. I realized that the city couldn't be a bad 
place as long as people were willing to help each other.
1.How did the writer feel when she was walking home after work?
A. Cold and sick                    
B. Lucky and hopeful
C. Satisfied and cheerful              
D. Disappointed and helpless
2.From the first paragraph, we learn that the writer was busy _____.
A. solving her problem at the bank      
B. getting used to the city life
C. learning acting in an evening school   
D. preparing for the first night show
3.On her way home the writer______.          
A. lost her wallet unknowingly
B. talked a lot with a garbage truck driver
C. was robbed of her wallet by a man with a knife  
D. found some homeless people following her
4.From the text, we can infer that the writer_____.
A. would stop working at night        
B. would stay on in San Francisco
C. would make friends with cleaners.   
D. would give up her job at the bank

查看答案和解析>>

同步練習(xí)冊答案
精品一区二区免费在线观看_国产精品久久久久久av福利软件_97成人精品区在线播放_国内成人精品一区
国产精品麻豆欧美日韩ww| 日韩av网站免费在线| 成人va在线观看| 中文字幕一区av| 99精品视频一区二区| 亚洲精品国产高清久久伦理二区| 色综合 综合色| 亚洲一级二级三级在线免费观看| 欧美日韩不卡一区| 人人狠狠综合久久亚洲| 欧美精品一区二区三区一线天视频 | 午夜精品成人在线视频| 日韩色在线观看| 国产美女娇喘av呻吟久久| 国产精品你懂的在线欣赏| 色欲综合视频天天天| 亚洲 欧美综合在线网络| 日韩美女一区二区三区| 国产成人免费视频一区| 亚洲欧美色一区| 欧美精品黑人性xxxx| 国内外成人在线视频| 国产精品乱子久久久久| 欧美亚洲禁片免费| 蜜臀91精品一区二区三区| 久久亚洲免费视频| 91视频观看视频| 日本怡春院一区二区| 久久久久久9999| 色呦呦网站一区| 美日韩一级片在线观看| 中文字幕第一区| 欧美日韩美少妇| 国产一区二区按摩在线观看| 自拍偷拍国产亚洲| 欧美日韩免费观看一区二区三区| 久久99九九99精品| 中文字幕一区二区三区精华液 | 国产欧美一区二区精品性色| 91福利视频在线| 九色|91porny| 一区二区三区在线视频观看 | 日韩高清不卡一区二区三区| 欧美激情综合五月色丁香小说| 在线观看免费视频综合| 国产麻豆精品一区二区| 一区二区免费在线播放| 久久婷婷国产综合国色天香| 91成人在线精品| 国产精品99久久久久久宅男| 亚洲一区二区高清| 国产亚洲欧美日韩在线一区| 精品1区2区3区| 福利一区二区在线观看| 日韩精品一级中文字幕精品视频免费观看| 国产拍欧美日韩视频二区| 欧美日高清视频| 成人免费黄色在线| 人禽交欧美网站| 亚洲美女在线国产| 久久综合久久鬼色中文字| 欧美特级限制片免费在线观看| 国产精品996| 三级在线观看一区二区 | 国产精品视频第一区| 日韩一区二区免费高清| 日本韩国一区二区三区| 国产成人精品午夜视频免费 | 免费不卡在线观看| 亚洲美女淫视频| 国产亚洲欧美日韩在线一区| 日韩一本二本av| 欧美体内she精高潮| 99vv1com这只有精品| 国产一区二区三区免费播放| 日韩精品成人一区二区在线| 亚洲欧美日韩一区二区三区在线观看| 久久综合久久综合久久综合| 91精品国产美女浴室洗澡无遮挡| 91亚洲精华国产精华精华液| 国产白丝网站精品污在线入口| 天天色天天爱天天射综合| 亚洲天堂网中文字| 国产欧美日本一区二区三区| 日韩精品在线一区二区| 欧美精品tushy高清| 在线视频一区二区三| 成人高清伦理免费影院在线观看| 韩日精品视频一区| 蜜臀久久99精品久久久画质超高清| 亚洲一线二线三线视频| 亚洲情趣在线观看| 国产精品久久久久久久久快鸭 | 久久久不卡影院| 日韩女优毛片在线| 666欧美在线视频| 欧美日韩五月天| 在线观看视频欧美| 日本韩国一区二区| 色婷婷精品久久二区二区蜜臀av | 日韩欧美专区在线| 91精品国产高清一区二区三区| 欧美日韩美少妇| 欧美日韩国产免费一区二区| 欧美婷婷六月丁香综合色| 在线观看亚洲a| 在线观看日韩电影| 欧美在线免费视屏| 欧美亚男人的天堂| 欧美视频在线观看一区| 欧美性受xxxx黑人xyx性爽| 在线观看国产日韩| 欧美私人免费视频| 欧美区一区二区三区| 欧美日本乱大交xxxxx| 在线播放91灌醉迷j高跟美女| 欧美日韩国产一区| 91精品国模一区二区三区| 69久久99精品久久久久婷婷| 91精品国产91久久久久久一区二区| 欧美一区二区大片| 日韩欧美的一区| 久久综合九色综合久久久精品综合 | 国精产品一区一区三区mba桃花| 九九久久精品视频| 国产精品一区二区久久不卡| 国产91高潮流白浆在线麻豆| 成人国产亚洲欧美成人综合网| 99久久精品国产麻豆演员表| 91色|porny| 欧美在线观看视频一区二区| 欧美人体做爰大胆视频| 日韩免费观看2025年上映的电影| www成人在线观看| 国产欧美综合在线| 亚洲欧洲综合另类在线| 洋洋成人永久网站入口| 天天综合色天天综合色h| 蜜臀av一区二区在线观看| 国内精品不卡在线| 成人av免费在线观看| 日本韩国一区二区| 91精品免费在线观看| 久久综合色综合88| 国产精品激情偷乱一区二区∴| 亚洲猫色日本管| 视频一区视频二区在线观看| 国产一区亚洲一区| av影院午夜一区| 欧美视频一区二区三区| 欧美成人精品3d动漫h| 欧美激情中文不卡| 一区二区三区四区不卡视频| 奇米888四色在线精品| 国产99精品在线观看| 色网站国产精品| 日韩午夜在线观看| 中文字幕av一区 二区| 亚洲一区电影777| 精品一区二区免费| 91在线视频免费观看| 666欧美在线视频| 亚洲国产精品av| 亚洲成在线观看| 国产一区二区成人久久免费影院| 色综合一个色综合| 欧美一级搡bbbb搡bbbb| 中文字幕不卡的av| 视频一区二区三区在线| 丁香六月综合激情| 欧美日本在线播放| 中文字幕精品一区二区精品绿巨人| 亚洲综合免费观看高清在线观看| 老司机免费视频一区二区| 99久久精品国产一区| 日韩欧美国产综合| 亚洲色图在线视频| 久久精品二区亚洲w码| 色综合天天天天做夜夜夜夜做| 日韩美女一区二区三区| 亚洲精品日产精品乱码不卡| 黄网站免费久久| 欧洲一区二区三区在线| 国产色产综合产在线视频| 性做久久久久久久免费看| 国产精品 日产精品 欧美精品| 欧美日韩亚洲综合在线| 国产精品视频线看| 婷婷开心久久网| 99国产一区二区三精品乱码| 日韩精品一区二区三区视频播放 | 一区二区三区在线观看国产| 国产一区中文字幕| 欧美精品色一区二区三区| 中文字幕中文字幕一区| 久久国产成人午夜av影院| 欧美伊人精品成人久久综合97| 国产日韩欧美精品电影三级在线| 日韩国产高清在线| 91福利视频在线|