阅读理解Itisdifficultfordoctorstohelpap

阅读理解 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, and 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 them1.The biggest difficulty in operating on the damaged brain is that A.the time is too short for doctorsB.the patients are often too nervousC.the damage is extremely hard to fixD.the blood-cooling machine might break down2.The brain operation was made possible mainly by A.taking the blood out of the brainB.trying the operation on monkeys firstC.having the blood go through a machineD.lowering the brain’s temperature3.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 brainc. have the blood cooled down d. operate on the brainA.a, b, c, dB.c, a, b, dC.c, b, d, aD.b, c, d, a

ADB解析文章讲述的是给予受损的大脑手术是很困难的，主要由于大脑存活时间过短，有一个医生提出了冷却的方法，让手术变得有可能。1.推理判断题，根据第一段Without enough blood, the brain lives for only three to five minutes可知，大脑只能存活三到五分钟，时间太短。2.根据第二段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可知，如果让大脑冷却，大脑可以存活三十分钟。3.根据最后一段可知。

对的，就是这个意思