题目内容
B
Everybody hates rats. But rats may soon be man’s new best friends.
What happens after an earthquake? We send in rescue (援救) dogs. Why? Because they can smell people. Dogs save lives. 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 the 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. “ Robots’ noses don't work well when there are other smells around. Rats are good at that, ”says a scientist. 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 a scientist says , “It would be fantastic. A rat could get into spaces we couldn^ get to and a rat would get out if it wasn't safe.”Per?haps for the first time in history,people will be happy to see a rat in a building (but only after an earthquake,of course) .
36.In the writer’s opinion,rats will become man’s best friends because they can.
A.serve as food for people
B.help rescuers to find living people
C.be lovely
D.completely replace man’s rescue jobs
37.What does the underlined word “this” mean?
A. An earthquake.
B. The rat has smelt a person.
C.The rat’s brain activity jumps.
D.The rat has found a robot.
38.Which of the following is NOT true?
A.Rats don't need electricity.
B.Rats are better than robots when smelling.
C.Rats are as clever as radios.
D.Rats can see things in the dark when doing rescues.
39.Why does the “rat project” sound great according to the passage?
A.Because rats can get into very small spaces.
B.Because rats have better noses than dogs.
C.Because rats don't look like robots.
D.Because rats are very brave.
40.Which is the best title of this passage?
A.Ways of saving people
B.Rats and robots
C.After earthquake
D. Rats for rescue
36.B 根据第二段 a new research project is using a smaller animal to save lives:the rat知，老鼠可以帮助救援人员找到幸 存者，故选B.
37.B 根据第三段知老鼠通过训练后就能够闻到人的体味。 当老鼠闻到人的体味后，它的大脑就会发出信号，故此处的 this是指“老鼠闻到人的体味”，故选B.
38.C根据第四段的描述知选项A、B、D所陈述的内容是正确 的;而C项内容与原文不符，故选C.
39.A 根据最后一段“ A rat could get into spaces we couldn’t get to and a rat would get out if it wasn’t safe."知，老鼠可以进人狭 小的空间，并且在遇到危险时还可以很快从狭小的空间里出 来，因此，研究用老鼠帮助救援工作是很棒的。
40.D 短文讲述老鼠通过训练后可以在地震救援工作中帮助 搜寻生命迹象，故选项D的Rats for rescue为短文的最佳 标题。
