首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
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
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
admin
2013-01-20
39
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.
【C17】
选项
A、shifts
B、converts
C、modifies
D、varies
答案
D
解析
词义辨析题。shift意为“移动”,convert意为“转换”,modify意为“修改”,vary意为“变化”。结合句意可知,所处地点不同,所受辐射量也不一样,所以D正确。
转载请注明原文地址:https://jikaoti.com/ti/iHwFFFFM
0
大学英语四级
相关试题推荐
InbothChinaandDenmarkchildrenare【S1】______andtheyreceiveagreatdealofattention.However,thewaychildrenareraised
InbothChinaandDenmarkchildrenare【S1】______andtheyreceiveagreatdealofattention.However,thewaychildrenareraised
Whenyouthinkaboutthegrowthofhumanpopulationoverthelastcenturyorso,itisalltooeasytoimagineitmerelyasani
AreYourKidsEatingJunk?DevelopHealthyEatingHabitsInYourChildrenTheotherdayIwatchedaveryinf
A、Hotclimate.B、Higherincome.C、Dietwithoutvegetables.D、Littleattentiontoexercise.D细节辨认题。对话中男士提到了导致美国人肥胖的几个原因,包括低收入、天气、
AnewreportreleasedbytheAmericanFederationofTeachers(AFT)remindsusofatopiceducationwriterslikemealmostnever
AnewreportreleasedbytheAmericanFederationofTeachers(AFT)remindsusofatopiceducationwriterslikemealmostnever
A、Theyaremoreinteresting.B、Theyaremoretiredofstudying.C、Theyaremorehighlymotivatedinclass.D、Theyareburdenedw
A、Itcaninvestinsometradingprojects.B、Itcansupervisefinancialmarketing.C、Itcancontroltheinterestrate.D、Itcans
随机试题
计划
Everylivingthinghasaninnerbiologicalclockthatcontrolsbehavior.Theclockworksallthetime;evenwhentherearenoou
实验设计的四个基本原则是
海关对保税物流园区企业实行的制度是()。
新课程倡导的发展性评价的基本内涵包括()。①评价的目的在于促进发展②体现最新的教育观念和课程评价发展的趋势③评价内容综合化、方式多样化、主体多元化④关注发展过程,将形成性评价与终结性评价有机结合起来
根据我国《义务教育法》的规定,国家建立以()为主、其他多种渠道筹措教育经费为辅的体制。(济宁高新)
与十一届全国人民代表大会相比,十二届人代会在代表结构与组成上呈现“两升一降”的变化,来自一线的工人、农民代表401名,占代表总数的13.42%,提高了5.18个百分点;专业技术人员代表610名,占代表总数的20.42%,提高了1.2个百分点;党政领导干部代
(89年)若齐次线性方程组只有零解,则λ应满足的条件是_______.
Nearlyallcultureshaveaversionofthearrowoftime,aprocessbywhichtheymovetowardsthefutureandawayfromthepast.
有以下程序#include<stdio.h>main(){structSTU{charname[9];charsex;doublescore[2];};structSTUa={"Zha
最新回复
(
0
)