首页
登录
职称英语
Space is a dangerous place, not only because of meteors (流星) but also becaus
Space is a dangerous place, not only because of meteors (流星) but also becaus
游客
2024-02-14
23
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 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 "rems" (雷目). 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 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】______far more radiation【C20】______without being damaged; the figure of 60 rems has been agreed. [br] 【C1】
选项
A、for
B、with
C、on
D、as
答案
D
解析
act as“充当、起……作用”;act for“代表、代理”;act on“按照”。本句意为“大气层为地球起到保护伞作用。”
转载请注明原文地址:https://tihaiku.com/zcyy/3451386.html
相关试题推荐
[audioFiles]audio_eufm_j75_001(20082)[/audioFiles]A、Becausethepolicemanstopp
Skydiving,adifficultanddangeroussport,isverypopular______bothmenand
Icouldn’tsleeplastnightbecausethetapinthebathroomwas______.A、draining
They____________(被拒绝进入)themilitaryexhibitionbecausetheywereforeigners.
Itwasdifficultforhimtobuygoodshoesbecausehehadsuchabig______off
Spaceisadangerousplace,notonlybecauseofmeteors(流星)butalsobecause
Spaceisadangerousplace,notonlybecauseofmeteors(流星)butalsobecause
Spaceisadangerousplace,notonlybecauseofmeteors(流星)butalsobecause
Spaceisadangerousplace,notonlybecauseofmeteors(流星)butalsobecause
Spaceisadangerousplace,notonlybecauseofmeteors(流星)butalsobecause
随机试题
DearSirorMadam
Motivationis"thedrivingforcewithinindividualsthatimpelsthemtoact
I’msurehedidn’tknow(exact)______whathewasdoingwhiletheaccidenttook
Astrolltoschoolinthemorningcanhelpkidsprepareforthestressestha
有人说,生产安全事故防不胜防。例如2017年1月12日11点50分左右,安徽某市
处方格式组成包括()A.君、臣、佐、使顺序 B.药品剂量与数量 C.处
中性点有效接地系统中的互感器,允许在(____)额定电压下运行(____)。1.
二、根据以下资料,回答111~115题。2012年,全国国内旅游人数29.57亿
年轻恒牙牙根完全形成是在( )。A.萌出时 B.萌出后6个月 C.萌出后7
某项目部承建城市主干道道路大修工程,道路全长5.8km,双向6车道,该道路
最新回复
(
0
)