题目内容

9．It is difficult for doctors to help a person with a damaged brain．Without enough blood，the brain lives for only three to five minute．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．

28．The biggest difficulty in operating on the damaged brain is thatA．
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
29．The brain operation was made possible mainly byC．
A．taking the blood out of the brain
B．trying the operation on monkeys first
C．lowering the brain's temperature
D．having the blood go through a machine
30．What is the right order of the steps in the operation？B
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
31．With Dr．White's new idea，the operation on the damaged brainA．
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．

分析 本文是一篇人物故事类阅读．文章主要讲述的是医生不断探索如何给受伤的脑部做手术的事．针对脑部手术时间短这一现状专家们想出了相应的应对办法．

解答 28-31 ACBA
28．A．细节理解题．根据"It is difficult for doctors to help a person with a damaged brain．Without enough blood，the brain lives for only three to five minute．"可知脑部手术的难度在于它的时间必须很短．故选A．
29．C．细节理解题．根据"If it is very cold，the brain can live without blood for 30 minutes．"可知大脑可以在温度很低的情况下存活三十分钟．所以脑部手术通常在温度较低的情况下进行．故选C．
30．B推理判断题．由最后一段"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．"可知首先要冷却血液，然后将冷却的血液输送回大脑，再防止血液流回大脑，最后实施脑部手术．故选B．
31．A．细节理解题．根据"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．"可知把大脑冷却可以延长手术时间，使手术时间延长到三十分钟．故选A．

点评 本文是一篇人物故事类阅读．文章主要讲述的是医生不断探索如何给受伤的脑部做手术的事．此类题型主要考查学生的细节理解和推理判断能力．细节理解题是针对文中某个细节、某句话或某部分具体内容设置问题，所以在做细节理解题时要结合原文和提干有针对性的找出相关语句进行仔细分析，再结合选项选出正确答案．在做推理判断题时不要以个人的主观想象代替文章的事实，要联系上下文根据文章事实进行合乎逻辑的推理判断．

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Good morning，everyone，
It's great honor for me to speak here．My name's Li Xiaojun，born of a harmonious family．My father and mother are all high school teachers．Influenced by them，I read widely during my early age，but I've developed a great interest in arts and sports．I'm easygoing，get along well with my classmates．
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