距离2015年管理类联考(MPAcc)初试还有最后一天的时间，太奇2015年管理类联考模考串讲最后一阶段测试圆满结束，MPAcc考生们 有必要 利用最后几天的时间调整迎考状态。针对MPAcc考研英语，太奇教育结合多年考研辅导经验，独具特色的太奇学 习法让每一位太奇学员受益匪浅。进入MPAcc冲刺阶段备考，太奇MPAcc为大家整理MPAcc 英语阅读“每日一练”，希望MPAcc考生们可以借助试题提高解题速度。

　　Space is a dangerous place, not only because of meteors (流星) but also because of rays from the sun and other stars. The atmosphere again acts as our protective blanket on earth. Light gets through, and this is essential for plants to make the food which we eat. Heat, too, makes our environment endurable. Various kinds of rays come through the air from outer space, but enormous quantities of radiation from the sun are screened off. As soon as men leave the atmosphere they are exposed to this radiation but their spacesuits or the walls of their spacecraft, if they are inside, do prevent a lot of radiation damage.

　　Radiation is the greatest known danger to explorers in space. The unit of radiation is called "rem". Scientists have reason to think that a man can put up with far more radiation than 0.1 rem without being damaged; the figure of 60 rems has been agreed on. The trouble is that it is extremely difficult to be sure about radiation damage — a person may feel perfectly well, but the cells of his or her sex organs may be damaged, and this will not be discovered until the birth of deformed children or even grandchildren. Missions of the Apollo flights have had to cross belts of high radiation and, during the outward and return journeys, the Apollo crew accumulated a large amount of rems. So far, no dangerous amounts of radiation have been reported, but the Apollo missions have been quite short. We simply do not know yet how men are going to get on when they spend weeks and months outside the protection of the atmosphere, working in space laboratory. Drugs might help to decrease the damage done by radiation, but no really effective ones have been found so far.

　　1. According to the first paragraph, the atmosphere is essential to man in that .

　　A. it protects him against the harmful rays from space

　　B. it provides sufficient light for plant growth

　　C. it supplies the hear necessary for human survival

　　D. it screens off the falling meteors

　　2. We know from the passage that .

　　A. exposure to even tiny amounts of radiation is fatal

　　B. the effect of exposure to radiation is slow in coming

　　C. radiation is avoidable in space exploration

　　D. astronauts in spacesuits needn't worry about radiation damage

　　3. The harm that radiation has done to the Apollo crew members .

　　A) is insignificant B) seems overestimated

　　C) is enormous D) remains unknown

　　4. It can be inferred from the passage that .

　　A. the Apollo mission was very successful

　　B. protection from space radiation and cure the related disease are no easy job

　　C. astronauts will certainly have deformed children or grandchildren

　　D. radiation is not a threat to well-protected space explorers