2015-03-01 07:30:00 来源:网络发表评论
备考辅导:英语备考策略和技巧 联考英语翻译备考策略 2015在职硕士考试经验技巧
GCT考试: GCT英语备考辅导 GCT数学备考辅导 GCT语文备考辅导 GCT逻辑备考
公共管理: 公文写作范文汇总 2015年在职MPA管理学案例材料 人力资源营销新论
艺术硕士: 艺术硕士艺术概论资料汇总 艺术硕士复习试题|答案 艺术硕士备考知识点
Passage 5
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(畸形)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 a 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 heat 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 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 is no easy job
C. astronauts will have deformed children or grandchildren
D. radiation is not a threat to well-protected space explorers
5. The best title for this passage would be ______.
A. The Atmosphere and Our Environment
B. Research on Radiation
C. Effects of Space Radiation
D. Importance of Protection Against Radiation
GCT | 【特训】2015年GCT英语全程专项特训班 | ¥980 | 免费试听 |
【特训】2015GCT语文全程专项特训班 | ¥400 | 免费试听 | |
【特训】2015年GCT数学全程专项特训班 | ¥680 | 免费试听 | |
【特训】2015年GCT逻辑全程专项特训班 | ¥400 | 免费试听 | |
联考英语 | 【提高】2015年联考英语技巧提高班 | ¥680 | 免费试听 |
【冲刺】2015年联考英语冲刺抢分班 | ¥680 | 免费试听 | |
法律硕士 | 【全程】2015法律硕士专业综合全程 | ¥880 | 免费试听 |
工商管理 | 写作专项零基础班数学专项逻辑专项 | ||
专项班 | 公共管理会计硕士教育硕士艺术硕士 |
版权及免责声明
1,"新东方在线"上的内容,包括文章、资料、资讯等, 本网注明"稿件来源:新东方在线"的,其版权 均为"新东方在线"或北京新东方迅程网络科技有限公司所有 ,任何公司、媒体、网站或个人未经授权不得转载、链接、转贴或以其他方式使用。已经得到 "新东方在线"许可 的媒体、网站,在使用时必须注明"稿件来源:新东方",违者本网站将依法追究责任。
2, "新东方在线" 未注明"稿件来源:新东方"的 文章、资料、资讯等 均为转载稿,本网站转载出于传递更多信息之目的,并不意味着赞同其观点或证实其内容的真实性。如其他媒体、网站或个人从本网站下载使用,必须保留本网站注明的"稿件来源",并自负版权等法律责任。如擅自篡改为 " 稿件来源:新东方 " ,本网站将依法追究其法律责任。
3,如本网转载稿涉及版权等问题,请作者见稿后在两周内与新东方在线联系。