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
29
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.
【C16】
选项
A、conventional
B、common
C、general
D、normal
答案
D
解析
conventional“传统的”;common“共同的、普通的”;general“一般的、总体的”; normal“正常的”。本句意为:我们每年接受的正常辐射量……,故选normal‘
转载请注明原文地址:https://kaotiyun.com/show/Qw57777K
0
大学英语四级
相关试题推荐
Spaceisdangerousplace,notonlybecauseofmeteors(流星)butalsobecauseofraysfromthesunandotherStars.Theatmospherea
Spaceisdangerousplace,notonlybecauseofmeteors(流星)butalsobecauseofraysfromthesunandotherStars.Theatmospherea
A、Hewouldliketoknowwhathappened.B、Becauseofwhathappened,hehadnotime.C、Hecanhelpthewoman.D、Hewouldhavehelp
AdetailedandthoroughresearchprojectundertakenbytheOpenUniversityrecentlyreportedthattheirevidenceappearstoshow
Itiseasiertonegotiateinitialsalaryrequirementbecauseonceyouareinside,theorganizationalconstraints(约束)influencewa
Duringrecentyearswehaveheardmuchabout"race":howthisracedoescertainthingsandthatracebelievescertainthingsand
A、Becausetheyareinahurry.B、Becausetheyarestrange.C、BecausetheycannotwatchTV.D、Becausetheyhaveotherschedules.
A、Becauseshehasredhair.B、Becauseshelookslikethemissinggirl.C、Becauseshehasblackhair.D、Becauseherphotoisint
随机试题
AsaresultoftheFirstWorldWarwasestablished______in19()
A.单样本t检验B.配对t检验C.成组设计两样本均数比较的t检验D.成组设计两样本几何均数比较的t检验E.u检验将钩端螺旋体病人的血清分别用标准株与水生株作凝溶试验,测得稀释倍数如下:标准株(10人):100200400400400
自由质点受力作用而运动时,质点的运动方向是()。
若某项目的设计生产能力为年产100011电A产品,达产年销售收入为30万元(不含税),年固定总成本为10万元,年可变总成本为9万元(不含税),年销售税金与附加为3600元。以生产能力利用率表示的盈亏平衡点为()。
甲公司(系上市公司)为增值税一般纳税人,适用增值税税率为17%,企业所得税税率25%,企业所得税采用资产负债表债务法核算。不考虑增值税、企业所得税以外的其他相关税费。甲公司2013年度财务报告于2014年3月31日经董事会批准对外报出。假设甲公司2013年
(2010年考试真题)根据土地增值税法律制度的规定,下列情形中,纳税人应当进行土地增值税清算的有()。
TheFoodandDragAdministrationsaidonWednesdaythatitistryingtotrackdownasmanyas386pigletsthatmayhavebeengen
借贷资本跟职能资本(产业资本、商业资本)在特征上是相同的。()
依据同一系统内部的业务领导或指导关系而实施的行政系统内部监督是()。
在SQL语言中,删除基本表的命令是(38),修改表中数据的命令是(39)。
最新回复
(
0
)