首页
登录
职称英语
Space is a dangerous place, not only because of meteors (流星) but also because of
Space is a dangerous place, not only because of meteors (流星) but also because of
游客
2024-02-17
22
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] 【C2】
选项
A、stars
B、sun
C、earth
D、space
答案
C
解析
词义辨析题,结合our proective blanket on... 可知,保护层是地球上的,所以C正确
转载请注明原文地址:https://tihaiku.com/zcyy/3457364.html
相关试题推荐
[originaltext](32)Manyanimalsrecognizetheirfoodbecausetheyseeit.So
Becausesomanypeopleintheirteensandearly20sareincreasinglysociali
Becausesomanypeopleintheirteensandearly20sareincreasinglysociali
Becausesomanypeopleintheirteensandearly20sareincreasinglysociali
Becausesomanypeopleintheirteensandearly20sareincreasinglysociali
Becausesomanypeopleintheirteensandearly20sareincreasinglysociali
[originaltext]W:Whydidn’tyouhaveyourphysicsclasstoday?M:Becauseonly
[originaltext]W:Whydidn’tyouhaveyourphysicsclasstoday?M:Becauseonly
[originaltext]W:Whydidn’tyouhaveyourphysicsclasstoday?M:Becauseonly
[originaltext]W:Whydidn’tyouhaveyourphysicsclasstoday?M:Becauseonly
随机试题
Scientistshavetakenagiantleaptowardmakingpossiblethedreamofbuildi
(1)Theblind,overweightpatientinthewheelchairhasterriblepaininher
Nothingbutsomemagazines______inherhandbag.A、werefoundB、wasfoundC、hasfo
Thesediscoveriesmaythrowlightontheoriginsoftheuniverse.Theunderlined
What______havetheHealthAuthoritiestakentopreventtheepidemicspreading?A
耳屏前,下颌骨髁状突的后方,张口时呈凹陷处的腧穴是A、耳门 B、听宫 C、听
A.《进口药品注册证》 B.《医药产品注册证》 C.《进口准许证》 D.《
某企业20×2年因债务担保确认了预计负债600万元,但担保发生在关联方之间,担保
闭路监控系统中,可近距离传递数字信号,不需要调制、解调、设备花费少的传输方式是(
以下方法中诊断膀胱癌最可靠的方法是A.MRI B.膀胱镜 C.CT D.尿
最新回复
(
0
)