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
2024-05-05
12
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【B1】______ again acts as our protective blanket on earth. Light gets through, and this is【B2】______ for plants to make the food which we eat. Heat, too, makes our environment【B3】______. Various kinds of rays come through the air from outer space, but enormous quantities of radiation from the sun are【B4】______ off. As soon as men leave the atmosphere they are exposed to this【B5】______ and their spacesuits or the walls of their spacecraft, if they are inside, do【B6】______ a lot of radiation damage.
Radiation is the greatest known danger to【B7】______ in space. The unit of radiation is called "rem". Scientists have reason to think that a man can put up with far more radiation than 0.1 rem without being damaged; the figure of 60 rems has been agreed on. The trouble is that it is 【B8】______ difficult to be sure about radiation damage—【B9】______, and this will not be discovered until the birth of deformed children or even grandchildren. Missions of the Apollo flights have had to cross belts of high amounts of rems.【B10】______,we simply do not know yet how men are going to get on, when they spend weeks and months outside the protection of the atmosphere, working in a space laboratory. Drugs might help to decrease the damage done by radiation,【B11】______ [br] 【B8】
选项
答案
extremely
解析
此空位于系动词“is”和形容词之间,推测这里应填入一个副词,用以修饰“difficult”,表程度。注意extremely的拼写,不要漏写里面的e。
转载请注明原文地址:https://tihaiku.com/zcyy/3584732.html
相关试题推荐
[originaltext]Ilovetreesbecausetheyhavemanydifferentshadesofgreen
[originaltext]Ilovetreesbecausetheyhavemanydifferentshadesofgreen
[originaltext]Ilovetreesbecausetheyhavemanydifferentshadesofgreen
Spaceisadangerousplace,notonlybecauseofmeteors(流星)butalsobecause
Spaceisadangerousplace,notonlybecauseofmeteors(流星)butalsobecause
Spaceisadangerousplace,notonlybecauseofmeteors(流星)butalsobecause
Spaceisadangerousplace,notonlybecauseofmeteors(流星)butalsobecause
Spaceisadangerousplace,notonlybecauseofmeteors(流星)butalsobecause
Becauseofsatellitelinkswhichnowenablebroadcastnewsorganizationsto
Becauseofsatellitelinkswhichnowenablebroadcastnewsorganizationsto
随机试题
Thinktwicenexttimewhensomeoneasksyoufor’fiveminutesofyourtime"
[originaltext]ThesecondMondayofJanuaryisComing-of-AgeDay,anational
在机电及金属结构设备安装中,( )要做好安装过程的质量监督与控制,对安装过程中
下列关于常用土石方机械的一般技术要求说法中正确的是()。A.机械操作人员经过安
在实际应用催收评分时,对于不同的客户情况,下面说法错误的是( )。A.行为模型
共用题干 1.Tiredofsocialnetworking?Loggi
可靠、无创判断胎儿成熟度的方法是A.B超检查 B.推算胎龄 C.羊水检查
陈某投资100元,报酬率为10%,累计10年可积累多少钱?()A.复利终值为2
班级是学校的细胞,是学校办学的基层组织单位。
A.叶酸 B.肝素 C.尿激酶 D.维生素K E.氨基己酸弥散性血管内凝
最新回复
(
0
)