It is difficult for doctors to help a person with a damaged brain. Without enough blood, the brain lives for only three to five minutes. More often the doctors can' t fix the damage. Sometimes they ar 题目和参考答案——青夏教育精英家教网—

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It is difficult for doctors to help a person with a damaged brain. Without enough blood, the brain lives for only three to five minutes. More often the doctors can' t fix the damage. Sometimes they are afraid to try something to help because it is dangerous to work on the brain. The doctors might make the person worse if he operates on the brain.
Dr. Robert White, a famous professor and doctor, thinks he knows a way to help. He thinks doctors should make the brain very cold. If it is very cold, the brain can live without blood for 30 minutes. This gives the doctor a longer time to do something for the brain.
Dr. White tried his idea on 13 monkeys. First he taught them to do different jobs, then he operated on them. He made the monkeys' blood go through a machine. The machine cooled the blood. Then the machine sent the blood back to the monkeys' brains. When the brain' s temperature was 10°C, Dr. White stopped the blood to the brain. After 30 minutes he turned the blood back on. He warmed the blood again. After their operations the monkeys were like they had been before. They were healthy and busy. Each one could still do the jobs the doctor had taught them.
【小题1】The biggest difficulty in operating on the damaged brain is that _______.

A．the time is too short for doctors

B．the patients are often too nervous

C．the damage is extremely hard to fix

D．the blood-cooling machine might break down

【小题2】The brain operation was made possible mainly by _______.

A．taking the blood out of the brain

B．trying the operation on monkeys first

C．having the blood go through a machine

D．lowering the brain' s temperature

【小题3】With Dr. White' s new idea, the operation on the damaged brain _______.

A．can last as long as 30 minutes	B．can keep the brain' s blood warm
C．can keep the patient' s brain healthy	D．can help monkeys do different jobs

【小题4】What is the right order of the steps in the operation?
a. send the cooled blood back to the brain
b. stop the blood to the brain
c. have the blood cooled down
d. operate on the brain

A．a,b,c,d

B．c,a,b,d

C．c, b, d, a

D．b, c, d, a

【小题1】A
【小题2】D
【小题3】A
【小题4】B

解析试题分析：文章介绍了一种新型的对脑部进行手术的方法，即通过冷却血液的方法来延长手术时间。
【小题1】A 推理题。根据第一段第二句Without enough blood, the brain lives for only three to five minutes.说明如果大脑没有血，脑部很快就会死亡的，故对医生来说最大的问题就是时间。
【小题2】D 细节题。根据第二段2,3句. He thinks doctors should make the brain very cold. If it is very cold, the brain can live without blood for 30 minutes.说明他想出的方法是冷却大脑，让大脑在冷却的状态下，进行手术。
【小题3】A 推理题。根据第二段第2行If it is very cold, the brain can live without blood for 30 minutes.说明大脑在冷却的情况下可以活30分钟，说明这样的手术也至少可以进行30分钟，故A正确。
【小题4】B 排除题。根据文章第三段内容：The machine cooled the blood. Then the machine sent the blood back to the monkeys' brains. When the brain' s temperature was 10°C, Dr. White stopped the blood to the brain. After 30 minutes he turned the blood back on.推理得到Dr. White可以先冷却血，然后再把血送回大脑，当温度到10度的时候停止血液的流动，接着就对大脑进行手术。故B正确。
考点：考查科技说明文短文阅读
点评：该类短文科技含量较高，生词较多，需要考生有一定耐心，不要被生词难住，这些生词是不影响答案的，同时也要加强推理能力的培养，如65题。

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