题目内容
Can robots ________ human beings some day?
- A.clear away
- B.take the place of
- C.take part in
- D.take the seat of
take the place of表示“代替”。
暑假接力赛新疆青少年出版社系列答案Everybody hates rats(老鼠). But in the earthquake capitals of the world—Japan, Los Angeles, Turkey—rats will soon be man’s new best friends.
What happens after an earthquake? We send in rescue dogs. Why? Because they can smell people. They help rescuers to find living people. But dogs are big and they can’t get into small spaces. So now a new research project is using a smaller animal to save lives: the rat.
How does it work? First, the rat is trained to smell people. When this happens, the rat’s brain gives a signal(信号). This is sent to a small radio on its back and then the rescuers follow the radio signals. When rat’s brain activity jumps, the rescuers know that someone is alive. The rat has smelled that person.
Although there are already robots which can do this job, rats are better. Christian Linster at Cornell University, New York, says, “Robots’ noses don’t work well when there are other smells around. Rats are good at that. ” Rats can also see in the dark. They are cheaper and quicker to train than dogs, and unlike robots, they don’t need electricity!
The “rat project” is not finished, but Julie Ryan of International Rescue Corps in Scotland says, “It would be fantastic. A rat could get into spaces we couldn’t get to, and a rat would get out if it wasn’t safe. ” Perhaps for the first time in history, people will be happy to see a rat in a building, but only after an earthquake, of course.
1. In the world earthquake capitals, rats will become man’s best friends because they can ______.
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A．take the place of man’s rescue jobs |
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B．find the position of people alive who are trapped in buildings |
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C．serve as food for people alive who are trapped in buildings |
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D．get into small spaces |
2.From the third paragraph we know the rescuers can judge a person is alive by ______.
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A．the noise made by the rat |
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B．the rat’s unusual behavior |
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C．the signal sent by the radio on the rat’s back |
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D．the smell given off by the person |
3.In doing rescue jobs, ______.
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A．rats smell better than dogs |
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B．dogs don’t need to be trained to smell people |
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C．robots’ sense of smell can be affected by other smells around |
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D．rats can see in the dark and they are smaller than robots |
4.Rats have all the following advantages EXCEPT that ______.
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A．they are more fantastic than other animals |
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B．they are less expensive to train than dogs |
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C．they don’t need electricity |
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D．they are small and can get into small places |
Humans have observed and explored the oceans since ancient times.But it wasn’t until the 19th century that the scientific study of oceans began.The first major scientific expedition,and the one that firmly established the field of oceanography,was the around-the-world voyage of H.M.S. Challenger.Setting out from England in 1872,the Challenger spent almost three and a half years gathering a wealth of information about seawater,sea life,and the ocean floor.Major oceanographic expeditions since then have included the South Atlantic voyage of the German ship Meteor in 1926 and the Deep-Sea Drilling Project from 1968 to 1983.Many individuals also have played important roles in advancing our understanding of oceans,beginning with Matthew Fontaine Maury in the mid-1800s;his work on oceanography and navigation led to a uniform system of weather reporting at sea.Since Maury’s time,oceanography has progressed rapidly.Early oceanographers had to contend themselves with tossing buckets overboard to see what they might haul in.Today’s oceanographers are equipped with space images,supercomputer models,and deep-sea robots that can crawl along the seafloor.As they set goals for the future,some oceanographers even dream of doing research in permanently manned stations on the bottom of the oceans.
1.Which of the following statements is true?
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A．Humans didn’t explore the oceans until the 19th century. |
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B．Maury first established the field of oceanography. |
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C．Maury spent a lot of time in studying seawater,sea life,and the bottom of the ocean. |
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D．Many individuals also plays a very important part in advancing our understanding of oceans,such as Maury. |
2.How many expeditions are mentioned in this passage?
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A．Four. |
B．Three. |
C．Five. |
D．Two. |
3.What can we infer from the passage?
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A．The process of the oceanography has stopped at one time. |
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B．Maury’s work on oceanography contributes a lot to weather reporting at sea. |
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C．Nowadays the equipment for studying the oceans needs improving,because it is out of date. |
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D．The expeditions in the past had great difficulty and made a lot of efforts in order to study the oceans. |