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
62
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] 【C6】
选项
A、environment
B、space
C、atmosphere
D、earth
答案
C
解析
逻辑衔接题。结合句意及常识可知,紫外线穿透的应该是atmosphere(大气),所以C正确。
转载请注明原文地址:https://tihaiku.com/zcyy/2842516.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
______(原本定于上周四举行的运动会)wasfinallycanceledbecauseofthebadweather.Thesports
[originaltext](32)Manyanimalsrecognizetheirfoodbecausetheyseeit.So
[originaltext](32)Manyanimalsrecognizetheirfoodbecausetheyseeit.So
Becausesomanypeopleintheirteensandearly20sareincreasinglysociali
Becausesomanypeopleintheirteensandearly20sareincreasinglysociali
Becausesomanypeopleintheirteensandearly20sareincreasinglysociali
Becausesomanypeopleintheirteensandearly20sareincreasinglysociali
随机试题
Thefirstsmallcamerawasinventedin1685,butitwasjustacamera.Itwas
[originaltext]Mall:Theredshirtis10dollarsandthewhiteoneis2dollars
给定IP地址为140.252.12.120,子网掩码是255.255.255.0
A.线形呋喃香豆素B.角形吡喃香豆素C.线形吡喃香豆素D.角形呋喃香豆素E.其他
(2014年)被审计单位存在涉嫌严重违法违规的情况时,经有关机关批准,审计机关可
下列关于变电站分类的说法正确的是()。35kV变电站一定是四类变电站$;
各种运输方式内外部的各个方面的构成和联系,就是( )。 A.运输系统
下列不属于“二十四史”的有()。A.《史记》 B.《资治通鉴》 C.《三国志
在理财产品销售过程中,应遵循风险匹配原则,根据这一原则,商业银行只能向客户销售(
(2021年真题)不需要检查溶散时限的丸剂是A.浓缩丸 B.小蜜丸 C.糊丸
最新回复
(
0
)