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

54.A.it B.that C.this D.its 查看更多

 

題目列表(包括答案和解析)

On June 26, 2000, two scientists, called Francis Collins and Craig Venter, told the world that they could read the whole “map” of the human body: DNA. DNA is something that everybody has, and it tells the body what to do. DNA is the reason that we look like our mother and father, because we get some of their DNA to make our own.

People have been trying to understand the human body for a long time. In 1860, Gregor Mendel discovered a special reason why we look the same as other people in our family. It is because of small things named “genes” in our body. In 1953, James Watson and Francis Crick made another discovery and found out that those small parts are real messages written in the DNA with a special language.

In 1961, Marshall Nirenberg and Johann Matthaci found a message in DNA showing how DNA tells the cell(細胞)to build its parts. Scientists have now found all the words in the DNA map, but we still do not understand what they all do. By understanding what just one “word”   means, we can help save more people from several illnesses.

Most people hope that this will help make better medicine and help sick people. Other people worry that when people begin to know more words and find out lots of other information, we might use it in a wrong way, just to make people more attractive, or stop sick people from getting jobs. Man would have to meet a lot of trouble if DNA technic wasn’t limited(限制)in use.

(  ) 51. When did we first know why we look like other people m our family?

A. In 1860.      B. In 1953.       C. In 1961.      D. In 2000.

(  ) 52. What does the underlined word “ genes” mean?

A. The “map” of DNA.                B. A special language.

C. Small parts of DNA.                D. DNA.  ,,

(  )53. What did the two scientists first discover in 1961 ?

A. The “map” of DNA.                B. A new illness.        

C. The language of DNA.              D. A message of DNA.

(  ) 54. What can we do if we understand some “ words” of the language inside the body

A. Make people get new jobs.           B. Make medicine for illnesses.

C. Make maps of human.               D. Make people less attractive.

(  ) 55. What do people think about this work’?

A. It can cause good or bad results.               B. It can cause only good results.

C. It can cause good results but won’t work.        D. It can cause only bad results.

查看答案和解析>>

In America, where labor(勞工)costs are so high, “do-it-yourself” is a way of life.Many people   46   their own cars, build their own garages, and even rebuild their own houses.

  47   many of them will also write their own books. In Hollywood there is a   48   that publishes(出版)children’s books with the help of computers.  49   other book companies also publish that way, this company is not like the others.It   50   the reader to become the main character(人物)with the help of computers.Here is   51   they do it.Let us suppose a child is named Jody.The computer uses this information to make up a story   52   pictures.The story is then printed up.“This book is about me,” a child who   53   such a book might say.So the company is called the “Me-Books Publishing Company”.  54   like me-books because they like to see in print their own names, their pictures, the names of their friends and their pets.But more   55  , in this way, readers are much more interested in reading the stories.Me-books are helping children to learn how to read.

(    )46.A.make               B.build                C.buy                       D.repair

(    )47.A.Otherwise      B.Only              C.Once                  D.Soon

(    )48.A.director        B.person           C.company              D.computer

(    )49.A.However         B.Although        C.That                  D.Unless

(    )50.A.allows          B.hates            C.hires(雇)          D.pays

(    )51.A.what            B.how             C.why                     D.where

(    )52.A.with            B.about            C.for                         D.except

(    )53.A.prints(印)    B.borrows        C.sells                     D.receives

(    )54.A.Writers        B.Children          C.Companies            D.Friends

(    )55.A.impossible       B.interesting        C.important              D.expensive

   

查看答案和解析>>

To learn a foreign language well, you need to spend a lot of time on it. The ___46___ time you spend on the language, the faster you will learn. This does not ___47___ sitting in class looking out of the window, nor listening to other students who do not speak well. This means spending time enjoyably on the ___48___ you are learning.

Listen to the language you are learning on your MP3 player. Read ___49___ you are listening to. Listen to and read things that you like, things that you can mostly ___50___, or even partly understand. One hour of listening or reading is more effective(有效率)than many hours of class time. If you ___51___ listening and reading, you will improve yourself.

Build up your vocabulary lists, which you’ll need lots of. Start to notice words and how they come ___52___ as phrases. Learn these words and phrases ___53___ listening and reading. Read online, using online dictionaries, and make your own vocabulary lists. Do not ___54___ for someone else to show you the language, nor to tell you what to do, and you should discover the language by yourself, like a child growing up. Talk when you feel like it. ___55___ when you feel like. You are learning and improving. The language will become clearer in your mind. Just make sure you spend enough time on the language.

1.

A.worse

B.less

C.more

D.farther

 

2.

A.mean

B.point

C.bring

D.make

 

3.

A.song

B.report

C.news

D.language

 

4.

A.how

B.what

C.where

D.why

 

5.

A.hear

B.write

C.understand

D.check

 

6.

A.finish

B.stop

C.remember

D.keep

 

7.

A.out

B.together

C.around

D.down

 

8.

A.through

B.across

C.between

D.except

 

9.

A.look

B.care

C.wait

D.use

 

10.

A.Speak

B.Listen

C.Read

D.Write

 

查看答案和解析>>


小題1:選擇下列詞匯完成下面的對話,其中一項為多余選項。
A.practice B.interestingC.boringD.cheering E.worried F.nervous
A:Now,Tony,what do you like best about being a football star?
B:I love to hear the (51)______,especially when I score a goal.And the pay is good.
A:Do you get (52) ______?
B:Yes,before the games.
A:Can you tell us something about your training?
B:We train very hard,especially before the big game.We run and(53)______ the skills
again and again.It’s a little bit(54)_______.
A:Are you(55)______ about tomorrow’s game?
B:No.We are the best team in the world and I’m sure we can win the game.
A:Thank you,Tony.And good luck tomorrow.
51._________  52._________  53._________  54._________  55._________
小題2:從方框中選擇合適的句子補全對話,其中兩項為多余選項。
A.I believe he was.B.Someone came to look for you early this morning.
C.Let me see.D.He has a medium build, I think.
E.He was about 30 years old or so.    F.I am not so sure now.    G.Yes.
A:(56)______.I told him you were not in and he left without any words.
B:Early this morning? That was strange.What did he look like?
A:(57)________
B:Was he tall or short?
A:He was neither tall nor short.(58)_______.
B:Was there anything unusual about his looks? What kind of face did he have?
A:(59)_______ It was round,but not very, I didn’t notice.
B:Was he wearing glasses?
A:(60)______.You see,I was too sleepy.I didn’t pay attention.
B:Well,I see.Thank you anyway.
A:Don’t mention it.
56._________  57._________  58._________  59._________  60._________

查看答案和解析>>


【小題1】選擇下列詞匯完成下面的對話,其中一項為多余選項。
A.practice B.interestingC.boringD.cheering E.worried F.nervous
A:Now,Tony,what do you like best about being a football star?
B:I love to hear the (51)______,especially when I score a goal.And the pay is good.
A:Do you get (52) ______?
B:Yes,before the games.
A:Can you tell us something about your training?
B:We train very hard,especially before the big game.We run and(53)______ the skills
again and again.It’s a little bit(54)_______.
A:Are you(55)______ about tomorrow’s game?
B:No.We are the best team in the world and I’m sure we can win the game.
A:Thank you,Tony.And good luck tomorrow.
51._________  52._________  53._________  54._________  55._________
【小題2】從方框中選擇合適的句子補全對話,其中兩項為多余選項。
A.I believe he was.B.Someone came to look for you early this morning.
C.Let me see.D.He has a medium build, I think.
E.He was about 30 years old or so.    F.I am not so sure now.    G.Yes.
A:(56)______.I told him you were not in and he left without any words.
B:Early this morning? That was strange.What did he look like?
A:(57)________
B:Was he tall or short?
A:He was neither tall nor short.(58)_______.
B:Was there anything unusual about his looks? What kind of face did he have?
A:(59)_______ It was round,but not very, I didn’t notice.
B:Was he wearing glasses?
A:(60)______.You see,I was too sleepy.I didn’t pay attention.
B:Well,I see.Thank you anyway.
A:Don’t mention it.
56._________  57._________  58._________  59._________  60._________

查看答案和解析>>


同步練習冊答案
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
久久精品男人天堂av| 亚洲第一搞黄网站| a亚洲天堂av| 中文字幕在线免费不卡| 色香色香欲天天天影视综合网| 亚洲免费看黄网站| 欧美日韩高清一区二区不卡| 日日摸夜夜添夜夜添亚洲女人| 日韩一级大片在线观看| 国产在线麻豆精品观看| 日本一区二区三区四区| jizz一区二区| 亚洲一二三四区| 制服丝袜在线91| 国产剧情一区在线| 亚洲欧洲国产日韩| 欧美视频精品在线观看| 免费精品视频最新在线| 久久只精品国产| av资源网一区| 香蕉加勒比综合久久| 欧美第一区第二区| 成人国产精品免费网站| 亚洲制服丝袜在线| 精品日韩在线观看| 成人一区二区视频| 夜夜嗨av一区二区三区网页| 在线91免费看| 岛国精品在线播放| 亚洲国产乱码最新视频| 精品国产99国产精品| 99久久婷婷国产精品综合| 婷婷久久综合九色综合伊人色| wwwwww.欧美系列| 91久久精品一区二区三区| 日本va欧美va精品| 国产精品久久久久久一区二区三区| 欧美三级电影网| 国产成人免费视频| 亚洲国产婷婷综合在线精品| 精品久久久久久久久久久久久久久久久 | www久久久久| 欧洲精品中文字幕| 国产乱码精品一区二区三区忘忧草| 自拍偷拍欧美精品| 日韩久久久久久| 色哟哟欧美精品| 国产一区在线精品| 亚洲午夜电影网| 国产欧美一区二区精品久导航| 欧美综合一区二区三区| 国产精品综合二区| 五月婷婷激情综合网| 国产日韩欧美亚洲| 欧美日本一区二区| 成人激情免费网站| 免费久久99精品国产| 亚洲摸摸操操av| 久久久久国产精品麻豆ai换脸| 欧美婷婷六月丁香综合色| 国产成人精品www牛牛影视| 日韩综合一区二区| 亚洲欧美日韩系列| 久久久久久久综合狠狠综合| 欧美日韩日日夜夜| 91免费观看国产| 国产成人综合在线| 毛片不卡一区二区| 一区二区三区视频在线看| 国产日韩欧美a| 日韩欧美另类在线| 欧美日韩五月天| 99视频在线精品| 国产剧情一区在线| 久久精品久久综合| 一个色综合av| 中文字幕字幕中文在线中不卡视频| 精品剧情在线观看| 在线成人免费视频| 在线观看一区日韩| 99视频一区二区| 国产不卡免费视频| 欧美一区中文字幕| 色婷婷久久久综合中文字幕| 国产suv精品一区二区三区| 捆绑调教美女网站视频一区| 亚洲高清不卡在线观看| 亚洲品质自拍视频网站| 国产精品三级久久久久三级| 精品99久久久久久| 日韩欧美一级二级三级| 欧美肥大bbwbbw高潮| 欧美在线短视频| 91麻豆国产自产在线观看| 北条麻妃一区二区三区| 国产一区二区导航在线播放| 久久成人久久鬼色| 男女激情视频一区| 男男gaygay亚洲| 欧美激情一二三区| 欧美日韩一区不卡| 国产一区二区三区久久悠悠色av| 日韩亚洲欧美在线观看| 欧美精品777| 欧美日韩精品高清| 欧美色视频在线| 欧美少妇性性性| 欧美少妇一区二区| 欧美日本一区二区三区四区 | 韩国成人在线视频| 精品一区二区在线视频| 精品一区二区免费在线观看| 成人黄色777网| 国产成人免费视频一区| 国产黑丝在线一区二区三区| 精品午夜久久福利影院| 久久国产精品99精品国产| 久久国产精品无码网站| 六月丁香婷婷久久| 国产又黄又大久久| 国产二区国产一区在线观看| 国产一二精品视频| 成人午夜在线免费| av网站一区二区三区| 一本久久a久久精品亚洲| 色8久久精品久久久久久蜜| 欧美性受xxxx黑人xyx性爽| 欧美午夜精品一区二区三区 | 日本韩国欧美三级| 欧美日韩精品一区二区天天拍小说 | 欧美日韩五月天| 日韩三级在线免费观看| 久久综合网色—综合色88| 国产欧美日韩亚州综合| 亚洲欧洲无码一区二区三区| 亚洲精品乱码久久久久久黑人| 亚洲一二三四在线| 免费在线观看日韩欧美| 国产一区二区精品久久| 99久久国产免费看| 欧美天堂一区二区三区| 欧美一区午夜视频在线观看| 欧美xxxxx牲另类人与| 日本一区二区三区久久久久久久久不 | 成人性视频免费网站| 色婷婷亚洲综合| 欧美一区中文字幕| 日本一区二区三区在线观看| 亚洲男人的天堂一区二区| 日韩和欧美的一区| 国产成人午夜99999| 一本到一区二区三区| 日韩一级在线观看| 欧美国产日韩a欧美在线观看| 亚洲免费在线观看视频| 秋霞av亚洲一区二区三| 国产成人av一区二区三区在线观看| 99国产精品一区| 91精品在线观看入口| 日本一区免费视频| 亚洲高清久久久| 国产精品99久久久久| 在线看不卡av| 欧美va亚洲va| 亚洲日本中文字幕区| 免费在线看一区| 99久久亚洲一区二区三区青草| 欧美精品18+| 中文一区一区三区高中清不卡| 亚洲国产视频a| 国产精品99久久久久久似苏梦涵| 在线视频综合导航| 亚洲精品一区二区三区福利| 1区2区3区国产精品| 免费成人深夜小野草| 成人app在线| 日韩免费高清av| 亚洲美女电影在线| 国产在线精品国自产拍免费| 色婷婷综合久久久久中文| 337p日本欧洲亚洲大胆精品 | 国产自产v一区二区三区c| 在线观看一区二区视频| 久久久三级国产网站| 亚洲成人免费在线观看| 成人免费av网站| 日韩精品专区在线| 亚洲自拍偷拍欧美| 高清国产一区二区| 欧美一级在线观看| 亚洲乱码中文字幕综合| 国产精品综合一区二区三区| 欧美日韩日本视频| 成人免费一区二区三区在线观看| 久久国产精品72免费观看| 欧美日韩一区二区在线视频| 国产精品午夜在线观看| 麻豆久久久久久久| 欧美日本在线一区| 亚洲乱码中文字幕综合|