首页
登录
职称英语
Space is a dangerous place, not only because of meteors(流星)but also because
Space is a dangerous place, not only because of meteors(流星)but also because
游客
2023-07-16
49
管理
问题
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【C1】______our protective blanket on【C2】______. Light gets through, and this is essential【C3】______plants to make the food which we【C4】______. Heat,【C5】______, makes our environments tolerable and some ultraviolet rays(紫外线)penetrate the【C6】______. Cosmic(宇宙的)rays of various kinds come【C7】______the air from outer space, but【C8】______quantities of radiation from the sun are screened off. As【C9】______as men leave the atmosphere they are【C10】______to this radiation;【C11】______their spacesuits or the walls of their spacecraft, if they are inside,【C12】______prevent a lot of radiation damage.
Radiation is the greatest known danger to explorers in【C13】______. Doses of radiation are measured in【C14】______called "rems(雷姆)". We all【C15】______radiation here on earth from the sun, from cosmic rays and from radioactive minerals. The "【C16】______"dose of radiation that we receive each year is about 100 millirems; it【C17】______according to where you live, and this is a very rough estimate. Scientists have reason to think【C18】______a man can【C19】______up with far more radiation【C20】______this without being damaged; the figure of 60 rems has been agreed. [br] 【C11】
选项
A、but
B、because
C、so
D、for
答案
A
解析
逻辑衔接题。本句的前半句意为“人们一离开大气层就会暴露于射线之中”,后半句意为“他们的太空服和太空船会阻止射线造成的损害”,由此可知,前后应该是转折关系,所以A正确。
转载请注明原文地址:https://tihaiku.com/zcyy/2842521.html
相关试题推荐
[originaltext]W:Whydidn’tyouhaveyourphysicsclasstoday?M:Becauseonly
[originaltext]W:Whydidn’tyouhaveyourphysicsclasstoday?M:Becauseonly
[originaltext]W:Whydidn’tyouhaveyourphysicsclasstoday?M:Becauseonly
[originaltext]W:Whydidn’tyouhaveyourphysicsclasstoday?M:Becauseonly
[originaltext](32)Manyanimalsrecognizetheirfoodbecausetheyseeit.So
[originaltext](32)Manyanimalsrecognizetheirfoodbecausetheyseeit.So
[originaltext](32)Manyanimalsrecognizetheirfoodbecausetheyseeit.So
Becausesomanypeopleintheirteensandearly20sareincreasinglysociali
Becausesomanypeopleintheirteensandearly20sareincreasinglysociali
Becausesomanypeopleintheirteensandearly20sareincreasinglysociali
随机试题
GoodWritingEducatorsinEnglish-speakingcount
A.abuseB.awardC.badlyD.complimentsE.correlationF.e
Puttingfeelingsintowordsmakessadnessandangerlessintense,U.S.brain
A根据aninternshipatalocalnewspaper定位到A段。8月底,多数俄亥俄青少年准备返回学校。但有一些可能前往某个当地报社实习,或
决定一个国家汇率制度的因素有()A.经济开放程度 B.人口素质状况 C.
《期货交易管理条例》的立法宗旨包括()。A.规范期货交易行为,加强对期货交易的
A. B. C. D.
有利于学生系统掌握人类所取得的经验和科学认识的课程种类是()。 A.学科课程
从需求替代角度界定相关商品市场时,需要考虑的因素有()。A.商品的外形、特性、
关于鞘膜积液的治疗,下列哪项措施疗效最不理想A.婴儿鞘膜积液、成人较小的鞘膜积液
最新回复
(
0
)