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
39
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
WewillholdthemeetingonFriday.We______________themeetingonFriday.[b
Wheredidthisconversationmostlikelytakeplace?[br][originaltext]W:Could
[originaltext]Todaywecontinueourseriesonecologyandconservationwith
TOEICistheTestofEnglishforInternationalCommunication.Itmeasuresth
甲状腺素的主要生理作用,下列哪项是不恰当的A.促进新陈代谢 B.促进蛋白质合成
家庭收入的分类主要包括:工作收入、理财收入和其他收入。下列属于其他收入的是(
房地产经纪专业人员职业资格是我国设置的一项职业资格,属于按照()管理的职业资
A.缩宫素 B.麦角新碱 C.血管紧张素胺(加压素) D.前列腺素 E.
在我国,税法的正式渊源包括()。A.宪法 B.税收法律 C
下列混凝土施工用模板中,最适宜用于冬期施工的是( )。A.组合钢模板 B.木
最新回复
(
0
)