Space is a dangerous place, not only because of meteors(流星...

来自 : www.k51.com.cn/QuestDetail/10e 发布时间：2021-03-24

大学英语四级题库/不定项选择题 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 1our protective blanket on earth. Light gets through, and this is essential for plants to make the food which we 2. Heat, too, makes our environments tolerable and some ultraviolet rays(紫外线的) penetrate the 3. Cosmic(宇宙的) rays of various kinds come 4the 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; 5their spacesuits or the walls of their spacecraft, if they are inside, 6prevent a lot of radiation damage. Radiation is the greatest known danger to explorers in 7. Doses of radiation are measured in units called “reins (雷目)”. We all 8 radiation here on earth from the sun, from cosmic rays and from radioactive minerals. The “normal” dose of radiation that we-receive each year is about two milligrams; it 9according to where you live, and this is a very rough estimate. Scientists have reason to think that a man can put up with far more radiation 10without being damaged; the figure of 60reins has been agreed.A. withB. asC. atmosphereD. spaceE. shiftF. eatG. earthH. thanI. butJ. variesK. recieveL. doM. convertsN. useO. through 1.[多选题]____A.B.C.D.E.F.G.H.I.J.K.L.M.N.O.2.[多选题]____A.B.C.D.E.F.G.H.I.J.K.L.M.N.O.3.[多选题]

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A.B.C.D.E.F.G.H.I.J.K.L.M.N.O.4.[多选题]____A.B.C.D.E.F.G.H.I.J.K.L.M.N.O.5.[多选题]____A.B.C.D.E.F.G.H.I.J.K.L.M.N.O.6.[多选题]____A.B.C.D.E.F.G.H.I.J.K.L.M.N.O.7.[多选题]____A.B.C.D.E.F.G.H.I.J.K.L.M.N.O.8.[多选题]____A.B.C.D.E.F.G.H.I.J.K.L.M.N.O.9.[多选题]____A.B.C.D.E.F.G.H.I.J.K.L.M.N.O.10.[多选题]____A.B.C.D.E.F.G.H.I.J.K.L.M.N.O. 参考答案： I,O,B,D,J,C,K,L,H,F 解题思路：>>>立即刷题 相关动态 2017年12月大学英语四级翻译真题及答案(第二套)：泰山 大学英语四级阅读技巧——大学英语四级阅读细节题答题技巧 大学英语四级作文——写作的“五项基本原则” 2017上半年大学英语四级查分 2018大学英语四级常用介词短语：as, by, of, with等 大学英语四级阅读技巧——破解阅读中的长难句 热点动态 2020年全国职称计算机考试和职称英语考試取消了吗？到底还考不考？ 全国计算机二级各科目考试题型及分值 什么是消极非金融机构？ 2020年全国计算机一级考试题型及分值 2018年大学英语B级考试题库原题——阅读理解 计算机等级考试题库之二级office到底有多少套真题？