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
43
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] 【C16】
选项
A、conventional
B、common
C、general
D、normal
答案
D
解析
词义辨析题,conventional 意为“传统的”,common 意为“共同的,普通的”,general 意为“一般的,总体的”,normal 意为“止常的”,本句意为“我们每年接受的 ______ 辐射量…”,只有normal 符合句意,所以D正确
转载请注明原文地址:https://tihaiku.com/zcyy/3457378.html
相关试题推荐
[originaltext](32)Manyanimalsrecognizetheirfoodbecausetheyseeit.So
[originaltext](32)Manyanimalsrecognizetheirfoodbecausetheyseeit.So
[originaltext](32)Manyanimalsrecognizetheirfoodbecausetheyseeit.So
Becausesomanypeopleintheirteensandearly20sareincreasinglysociali
Becausesomanypeopleintheirteensandearly20sareincreasinglysociali
Becausesomanypeopleintheirteensandearly20sareincreasinglysociali
Becausesomanypeopleintheirteensandearly20sareincreasinglysociali
Becausesomanypeopleintheirteensandearly20sareincreasinglysociali
Becausesomanypeopleintheirteensandearly20sareincreasinglysociali
[originaltext]W:Whydidn’tyouhaveyourphysicsclasstoday?M:Becauseonly
随机试题
DothefollowingstatementsagreewiththeviewsofthewriterinReadingPassag
下列各组词语中,注音有误的有( )。 A.A B.B C.C D.D
任何一种除草剂对于杂草的的毒性都是相对的。没有任何一种除草剂是绝对有毒或绝对无毒
设f(x)=(x-t)dt,则当x→0时,g(x)是f(x)的().A.高阶无穷
A、A B、B C、C D、D
对于同一组资料,以下哪项没有考虑到每个观察值的变异A.方差 B.样本标准差
胚乳细胞含糊粉粒,糊粉粒中有草酸钙小簇晶的药材是A砂仁 B五味子 C槟榔
《变电运维管理规定》:驻地宜设在重要枢纽变电站,原则上地市公司运维班工作半径(
A.v的取值由零开始增大时,杆对小球的作用力不变 B.v的取值由零开始增大时,
小王任教于某市重点中学。他为人孤僻,不喜欢与人交往。他一直认为作为老师把课讲好就
最新回复
(
0
)