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1941.The servant greeted me
发布:2024/6/27 10:35:59组卷:0引用:1难度:0.71942.In the birthday party Mary
在生日宴会上,玛丽迫不及待地打开了礼物。发布:2024/6/27 10:35:59组卷:0引用:1难度:0.61943.With their furry round heads and big black eyes,Zhongzhong and Huahua look just the same as any other monkey.But they happen to be the world's first cloned monkeys.
Years ago,scientists used cloning techniques to produce Dolly,the world's first cloned mammal(哺乳动物).They now used the same technique to produce the monkeys in China.
In animal cloning,animals are produced in a lab by using DNA that is taken from the cells of a naturally-born animal.To clone Zhongzhong and Huahua,scientists from the Chinese Academy of Sciences(CAS)first removed the nucleus (细胞核)from a monkey's egg cell.They then put another nucleus taken from the monkey's body cells into the egg cell.The newly-formed egg was put into the womb(子宫)of a female monkey.Finally,Zhongzhong and Huahua were born.
The cloning process is hard,especially removing nucleus.It needs to be done in a fast and precise(精确的) way.The faster you do it,the less damage is done to the egg,according to CAS.Scientist Liu Zhen spent three years practising removing the nucleus.
Unlike common monkeys,cloned monkeys have the same DNA as each other.When doing experiments on them,scientists can easily know that certain results are caused by different treatments,rather than different genes.
According to Sun Qiang from CAS,most drug trials(药物试验)are done on lab mice.However,drugs that work on mice might not work on humans.The two species are very different.
"Monkeys and humans are closely related and testing on monkeys is supposed to be as effective as testing on humans," Sun added.
(1)What can we learn about Zhongzhong and Huahua?
A.They are naturally-born monkeys.
B.They are the world's first cloned mammals.
C.They are the world's first cloned monkeys.
D.They are twin sheep that were born by Dolly.
(2)What do we know about the two monkeys?
A.They look different from other monkeys.
B.They have the same DNA.
C.Their body cells don't have any nucleus.
D.They can live for only three years.
(3)What can we learn from Paragraph 4?
A.Removing the nucleus is difficult.
B.The cloning process is very safe.
C.It took three years to remove the nucleus.
D.It is impossible to clone other animals.
(4)Why do scientists want to do drug tests on monkeys?
A.Because it's easier to use them for tests.
B.Because there are not enough mice.
C.Because drugs work well on monkeys.
D.Because monkeys are similar to humans.发布:2024/6/27 10:35:59组卷:10引用:1难度:0.51944.结合课文主题,使用本单元词汇写一篇50词左右的短文。
1.春节前妈妈总为我买新衣服。在新年那一天我就可以穿上盛装(dress up)了。我非常感激(grateful)我的妈妈。
2.另外,我们总会买各种各样的(a wide range of)水果和蔬菜。
3.每年除夕一家人聚在一起(gather)看春节联欢晚会,期待看到一些著名的人物(figure)。
4.尽管(in spite of)社会在变化,但是我们会利用(take advantage of)这个有重大意义的(significant)节日。
Positive feelings:It is fantastic/amazing/very exciting. /How wonderful! /How exciting! /It is great to have family gather together. /I'm really happy to enjoy delicious food. /I'm pleased to stay with family members.发布:2024/6/27 10:35:59组卷:7引用:1难度:0.51945.One by one,the applicants left the interviewer's office with
发布:2024/6/27 10:35:59组卷:15引用:4难度:0.81946.假定你是李华,新落成的外文书店为增加访客量现向市民征求建议,请给书店经理Mr.Bowie 写一封建议信,内容包括:
1.拥有宽敞的空间以提供良好的阅读体验;
2.提供公益讲座(public lecture)等服务;
3.其他建议(至少一条).
注意:
1.词数80左右;
2.可适当增加细节,以使行文连贯.发布:2024/6/27 10:35:59组卷:19引用:7难度:0.71947.运用下列写作词汇,自己创设一个语境,形成一个小语段。
seek one's fortune;earn a living;diversity;settle;construction;mild;climate;immigrant;diverse;first hand发布:2024/6/27 10:35:59组卷:2引用:1难度:0.41948.Robots are very important to space exploration and are being used in a variety of different ways for several important reasons.
Robots make great explorers on planets,moons,and other landing areas.Aside from the earth,just about every surface in the solar system is unsafe for humans to explore.The air on most other planets is insufficient for humans to breathe,making it necessary to wear a space suit and oxygen equipment.The temperatures on these surfaces are much too hot or much too cold for any humans to withstand.Robots have much less limitation in these areas and can survive much longer under these conditions.
Robots are designed for collecting scientific data.Robots are also able to perform many tasks at one time.Important scientific projects from detecting minerals,analyzing ground samples,to finding water are all performed much quicker and accurately by robots.
The use of robots has made the cost of space exploration much less expensive than it would cost for humans to do the work.In order to successfully send humans into space we would need to build a vehicle that can not only carry humans,but also enough food and water to keep them alive for the duration of the trip.Moreover,robots have no problems working for hours on end.Robots never complain,they don't require food or water,and they never need a bathroom break.
Over the past 30 years or so there have been many different types of robots used successfully in the exploration of space.Perhaps the most famous and successful robots are Spirit and Opportunity who have both been exploring the surface of Mars.They have both been very successful with experiments on soil and rocks and have even found evidence of water in Mars' history.
(1)Which of the following would be the best title for the passage?
A.The Development of Robots
B.The Discovery of Space Exploration
C.No Robots,No Space Exploration
D.Robots Are Used in Space Exploration
(2)What benefits can we get with the use of robots according to the fourth paragraph?
A.The use of robots has reduced the cost of space exploration.
B.The robots are in need of a little break to work continuously for hours.
C.Robots can perform tasks much slower but accurately.
D.Robots can be used to transmit scientific data.
(3)What does the underlined word "withstand" in Paragraph 2 most probably mean?
A.Remain.
B.Bear.
C.Defeat.
D.Develop.
(4)What is the writer's attitude in this passage?
A.Negative.
B.Persuasive.
C.Subjective.
D.Objective.发布:2024/6/27 10:35:59组卷:8引用:1难度:0.71949.At the end of the trip I
在旅行结束的时候,我发现我的英语水平提高了不少。发布:2024/6/27 10:35:59组卷:1引用:1难度:0.71950.A computer program has beaten a human player at the ancient Chinese board game Go(围棋).It marked an important advance for the (1)
Previous computers have beaten humans in other games.But among classic games,Go has long been viewed as the most challenging game for artificial intelligence to master.Therefore,many people find it (5)
Go involves two players who take turns putting markers on a checkerboard-like grid (格子).Players obtain the opponent's pieces (6)
Martin Mueller,a computing science professor, (9)发布:2024/6/27 10:35:59组卷:28引用:3难度:0.6
