首页
登录
职称英语
Space is a dangerous place, not only because of meteors(流星)but also because of r
Space is a dangerous place, not only because of meteors(流星)but also because of r
游客
2024-02-19
47
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.【C9】______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 "rem(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 two milligrams; it【C17】______according to where you live, and this is a very rough estimate. Scientists have reason to think【C18】______a man can【C19】______far more radiation【C20】______without being damaged; the figure of 60 rems has been agreed. [br] 【C8】
选项
A、valid
B、enormous
C、various
D、proper
答案
B
解析
valid有效的:various各种各样的;proper合适的。在四个选项中只有enormous表示“大量的”意思。
转载请注明原文地址:http://tihaiku.com/zcyy/3464560.html
相关试题推荐
Spaceisdangerousplace,notonlybecauseofmeteors(流星)butalsobecauseof
Spaceisdangerousplace,notonlybecauseofmeteors(流星)butalsobecauseof
Spaceisdangerousplace,notonlybecauseofmeteors(流星)butalsobecauseof
Itiseasiertonegotiateinitialsalaryrequirementbecauseonceyouarein
Itiseasiertonegotiateinitialsalaryrequirementbecauseonceyouarein
Itiseasiertonegotiateinitialsalaryrequirementbecauseonceyouarein
Itiseasiertonegotiateinitialsalaryrequirementbecauseonceyouarein
Nothingcanbewasted,andweare____________(从不为有多余的食物困扰)becausewehavenever
____________(所有的航班被取消)becauseofthesnowstorm,manypassengerscoulddonothing
A、Becausethequalityofwaterdecidesitsvolume.B、Becausehealthconditionsa
随机试题
Britainhasannouncedthatitistocancelabout200millionpounds’wortho
MobilephonesWhatAreMobilePhones?Amobileph
[originaltext]M:Isthisstoreopentoday?W:No,itisn’t.It’sonlyopenonw
WhatwasthemostpopularmixabouttheUnitedStatesinthe19thcenturywa
颅脑CT扫描的方法不包括A.平扫 B.增强扫描 C.立体扫描 D.脑血流灌
陈旧性心肌梗塞心电图的改变是( )。A.T波高尖 B.ST段水平下降 C.
对幼儿自我效能感影响最大的是来自他人的替代性经验。()
他急匆匆地赶到图书馆去()有关笔迹鉴定的材料。A.查询 B.查阅 C.
中央银行在公开市场上买卖有价证券,增加(),通过商业银行存款货币的创造功能,最
表面活性剂,可作栓剂基质A.微粉硅胶 B.羟丙基甲基纤维素 C.泊洛沙姆
最新回复
(
0
)