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
2009-09-12
41
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【B1】our protective blanket on【B2】. Light gets through, and this is essential【B3】plants to make the food which we【B4】. Heat, 【B5】, makes our environments tolerable and some ultraviolet rays(紫外线)penetrate the【B6】. Cosmic(宇宙的)rays of various kinds come【B7】the air from outer space, but【B8】quantities of radiation from the sun are screened off. As【B9】as men leave the atmosphere they are【B10】to this radiation;【B11】their spacesuits or the walls of their spacecraft, if they are inside,【B12】prevent a lot of radiation damage.
Radiation is the greatest known danger to explorers in【B13】. Doses of radiation are measured in【B14】called "rems(雷姆)". We all 【B15】 radiation here on earth from the sun, from cosmic rays and from radioactive minerals. The "【B16】"dose of radiation that we receive each year is about 100 millirems; it【B17】according to where you live, and this is a very rough estimate. Scientists have reason to think【B18】a man can【B19】up with far more radiation【B20】this without being damaged; the figure of 60 rems has been agreed.
选项
A、for
B、on
C、with
D、as
答案
D
解析
惯用搭配题。act与with通常不构成搭配,而act for意为“代表,代理”,act on意为“按照”,act as意为“充当,起…作用”,只有act as符合句意,在句中意为“大气层起到保护毯的作用”,所以D正确。
转载请注明原文地址:https://kaotiyun.com/show/Ky37777K
0
大学英语四级
相关试题推荐
A、Theyareinterestedinfairytales.B、Theyarecuriousandautonomous.C、Theyareaheadachetotheirparents.D、Theyareigno
A、Becausetheycancoverthehandsandthewrists.B、Becausetheyaremadeofhigh-qualitywool.C、Becausetheycanmaintainthe
A、Inspiring.B、Exciting.C、Depressing.D、Confusing.C
ThehousingmarketisexpectedtobebusierthanusualthiswinterassomehomebuyersrushtoactbeforetheFederalReservera
A)Dinosaurs,StarWars,trainschedules,Disneyprincesses,maps,LEGO—subjectssuchasthesecanbecomeall-consumingpassions
A、Theymayknownothingabouttheworld.B、Theymayhavelittleholidayspirit.C、Theymaybeextremelyinterestedintravelling
It’snosecretthatmanychildrenwouldbehealthierandhappierwithadoptiveparentsthanwiththeparentsthatnaturedealtt
Onlybyworkinghard__________(我们才能通过期末考试)andgetourbachelor’sdegrees.
Itisclear【S1】______theInternetholdshugepotentialfordevelopingcountriestoexpandbusiness,【S2】______jobs,improves
Theatmosphereandoceansarenottheonlypartsoftheenvironmentbeingdamaged.Rainforestsarebeingquicklydestroyedasw
随机试题
管式反应器的优点是减小返混和控制反应时间。()
男性,50岁。气短20年,2年来常有胸骨后疼痛,胸骨右缘第2肋间可闻及3/6级收缩期喷射性杂音,该处可以触到收缩期震颤,胸骨左缘第3肋间有舒张期叹气样杂音。该患者的诊断是
男性,30岁。因咳嗽、咯血伴低热1个月入院,查体:右上肺有少量湿性哕音。胸片示右上肺密度不均匀片状影,确诊为肺结核,拟行短程化学疗法。该病人行短程化学疗法时开始的1—3月内(强化阶段),用药方式是
护士应该获得的信息是:临床应用氯化钾,最重要的、绝对禁忌是
两人进行心肺复苏,一人做人工呼吸,另一人做心脏挤压,其比例是
下列关于劳逸损伤与疾病发生关系的叙述,错误的是
护士进行健康教育,提出有助于预防子宫脱垂的措施中错误的是
【2014专业知识真题下午卷】某地区海拔高度800m左右,35kV配电系统采用中性点不接地系统,35kV开关设备相对地雷电冲击耐受电压的取值应为下列哪项?()
(2011年考试真题)根据营业税法律制度的规定,下列业务中,属于营业税征税范围的是()。
•Lookatthenotesbelow.•Someinformationismissing.•Youwillhearpartofatalkgiventoagroupofnewempolyees.•Fo
最新回复
(
0
)