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
2012-09-19
56
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.
【C18】
选项
A、what
B、which
C、that
D、why
答案
C
解析
本句应填入引导宾语从句的代词,而从句不缺少主语和宾语,因而不选择what和which,又加之主句是陈述语气,故选择that。
转载请注明原文地址:https://kaotiyun.com/show/mw57777K
0
大学英语四级
相关试题推荐
AdetailedandthoroughresearchprojectundertakenbytheOpenUniversityrecentlyreportedthattheirevidenceappearstoshow
AdetailedandthoroughresearchprojectundertakenbytheOpenUniversityrecentlyreportedthattheirevidenceappearstoshow
Duringrecentyearswehaveheardmuchabout"race":howthisracedoescertainthingsandthatracebelievescertainthingsand
Duringrecentyearswehaveheardmuchabout"race":howthisracedoescertainthingsandthatracebelievescertainthingsand
Duringrecentyearswehaveheardmuchabout"race":howthisracedoescertainthingsandthatracebelievescertainthingsand
Duringrecentyearswehaveheardmuchabout"race":howthisracedoescertainthingsandthatracebelievescertainthingsand
A、Becausetheyareinahurry.B、Becausetheyarestrange.C、BecausetheycannotwatchTV.D、Becausetheyhaveotherschedules.
A、Becausetheoldonecouldnottransfersignalsclearly.B、Becausetheoldonecouldnotsendmessagesquicklyenough.C、Becaus
A、Becauseitcanhelpyouincaseyoudon’tknowwhattosaytoothers.B、Becausemanypartiesaskpeopletodothis.C、Because
A、Becausethereisanexcellentbusservice.B、Becausethereisanexcellentrailwayservice.C、Becausethereisallexcellents
随机试题
屈节辱命,虽生何面目以归汉?节:
关于临产后宫颈的变化,正确的是
建筑业企业资质证书有效期为()。
某外贸公司采取隐匿财产的手段,使税务机关无法追缴该公司所欠缴的税款11万元。根据《刑法》的规定,该公司的行为构成的罪名是()。
劳动合同被确认为无效,劳动者已经付出劳务的,用人单位应向劳动者支付劳动报酬。()
下列二级主题不属于“生物圈中的绿色植物”主题的是()。
(1995年)假设函数f(x)和g(x)在[a,b]上存在二阶导数,并且g"(x)≠0,f(a)=f(b)=g(a)=g(b)=0,试证:在开区间(a,b)内至少存在一点ξ,使
以下是学生选课系统中“学生成绩查询”交互行为的描述,请仔细阅读程序并完成要求。交互开始时,终端上显示首页,用户选择“查询”请求后,显示“请输入学号”。在用户输入学号后,系统核对学生学号:若输入的学号不正确,则显示“输入的学号不正确”,此次查询取消,
Sixpeopleweretravellinginacompartment(包厢)onatrain.Fiveofthemwerequietandwellbehaved,butthesixthwasarude
Forthousandsofyearscometshadbeenamysteryto【M1】______man.Theytravelacrosstheskyvery
最新回复
(
0
)