首页
登录
职称英语
Space is a dangerous place, not only because of meteors(流星)but also because
Space is a dangerous place, not only because of meteors(流星)but also because
游客
2024-02-17
3
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(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. [br] 【C11】
选项
A、but
B、because
C、so
D、for
答案
A
解析
逻辑衔接题。本句的前半句意为“人们一离开大气层就会暴露于射线之中”,后半句意为“他们的太空服和太空船会阻止射线造成的损害”,由此可知,前后应该是转折关系,所以A正确。
转载请注明原文地址:https://tihaiku.com/zcyy/3458785.html
相关试题推荐
[originaltext]W:Whydidn’tyouhaveyourphysicsclasstoday?M:Becauseonly
[originaltext]W:Whydidn’tyouhaveyourphysicsclasstoday?M:Becauseonly
[originaltext]W:Whydidn’tyouhaveyourphysicsclasstoday?M:Becauseonly
[originaltext]W:Whydidn’tyouhaveyourphysicsclasstoday?M:Becauseonly
[originaltext]W:Whydidn’tyouhaveyourphysicsclasstoday?M:Becauseonly
[originaltext]W:Whydidn’tyouhaveyourphysicsclasstoday?M:Becauseonly
[originaltext](32)Manyanimalsrecognizetheirfoodbecausetheyseeit.So
Becausesomanypeopleintheirteensandearly20sareincreasinglysociali
Becausesomanypeopleintheirteensandearly20sareincreasinglysociali
Becausesomanypeopleintheirteensandearly20sareincreasinglysociali
随机试题
Pleasekeepaneyeonmyluggage,andI’llbeback______.A、intimeB、innotime
[originaltext]SixtimesdefendingTourdeFranceWinnerLanceArmstrongin
[originaltext]M:Doyouwanttogotothelecturethisweekend?Iheartheguy
二阶欠阻尼系统质量指标与系统参数关系是()。A.衰减系数不变,最大偏差减小,衰减
为用户与数据库系统提供接口的语言是()A.高级语言 B.数据描述语言(DD
企业对外销售材料应分摊的材料成本差异,应转为( )。A.主营业务成本 B.销售
甘氨酸参与的代谢过程有()A.肌酸的合成 B.嘌呤核苷酸的合成 C.嘧啶
食物中毒按病原物质分为( )。A.维生素A中毒 B.有毒动植物中毒 C.真
“尊重”的心理学核心和本质含义是心理咨师对求助者的()。A.认同 B.接纳
背景资料 某矿井开拓系统如下图所示。一施工单位承担了该矿井的施工任务,施工方案
最新回复
(
0
)