首页
登录
职称英语
Space is filled with radiant energy and beyond earth’s atmosphere this energ
Space is filled with radiant energy and beyond earth’s atmosphere this energ
游客
2023-07-15
59
管理
问题
Space is filled with radiant energy and beyond earth’s atmosphere this energy flow steadily and intensely from the sun. An abundant and essential【C1】______of energy would be used in space by developing satellite solar【C2】______stations. To live in space, humans must be protected【C3】______the fierce intensity and penetrating sunlight. The colony will have to have enough energy to【C4】______a fairly uniform temperature. The sun is not dimmed【C5】______an atmosphere. Shaded materials not【C6】______to direct sunlight will almost be absolute zero, while the temperature can soar above the【C7】______point. The colony will need to have both heaters and【C8】______Fortunately, sun’s energy can be converted【C9】______electricity. Converting sun’s energy, we would【C10】______stations in the space that would intercept【C11】______sunlight. The stations intercept enough sunlight to【C12】______five nuclear reactors and they could be as【C13】______as nine miles long and four miles wide while they weigh twenty thousand tons. This is a【C14】______free way to generate electricity and cost no【C15】______than coal or nuclear energy. Solar cells do the actual converting. A useful material found in lunar soil is silicon which is used to make solar cells.【C16】______we can produce a large amount of these cells and then we avoid any problems of【C17】______the material from earth. A solar cell is made from two thin layers of silicon. Sunlight【C18】______on the cell shakes the electrons【C19】______, and then these electrons move off into an outside circuit, which is detected as an electrical current. Things are arranged【C20】______most of the work involved in generating the electricity is done by forces associated with the atoms themselves. [br] 【C4】
选项
A、sustain
B、contain
C、maintain
D、attain
答案
C
解析
动词辨析题。这句的意思是“用足够的能量保持均衡的温度”, maintain是“保持,维持”的意思,符合句意,故为答案。sustain“支撑”;contain“包含”;attain“获得”。
转载请注明原文地址:http://tihaiku.com/zcyy/2839934.html
相关试题推荐
In2010,PamelaFink,anemployeeofaConnecticutenergycompany,madeane
In2010,PamelaFink,anemployeeofaConnecticutenergycompany,madeane
In2010,PamelaFink,anemployeeofaConnecticutenergycompany,madeane
Todaypetroleumprovidesaround40%oftheworld’senergyneeds,mostlyfuel
Todaypetroleumprovidesaround40%oftheworld’senergyneeds,mostlyfuel
Todaypetroleumprovidesaround40%oftheworld’senergyneeds,mostlyfuel
Solarpowerisonekindofcleanenergiesthatareformsofenergywhichdo
Solarpowerisonekindofcleanenergiesthatareformsofenergywhichdo
Solarpowerisonekindofcleanenergiesthatareformsofenergywhichdo
Solarpowerisonekindofcleanenergiesthatareformsofenergywhichdo
随机试题
[originaltext]M:Ms.Lincoln,I’myourtenant,Joe.Ican’tgetconnectedonlin
Faces,likefingerprints,areunique.Didyoueverwonderhowitispossible
Childrenmodelthemselveslargelyontheirparents.Theydosomainlythroug
[originaltext]W:Hey,Tom.What’sup?Whereareyouoffto?M:I’monmywayto
某植物油加工厂生产采用的是油脂浸出工艺,以先进的化工萃取法提取大豆油脂,生产工具
胰头癌最常见的首发症状是A.上腹痛和上腹饱胀不适 B.黄疸 C.消化道症状
慢性阻塞性肺疾病病程中首先出现的血气结果异常为 A.PaO2降低B.Pa
作为判断国民经济变化的重要先行指标的是()。A.固定资产投资变动情况 B.存
根据《建筑法》,关于建筑工程发包与承包的说法,正确的有( )。A.分包单位按照
男,60岁。乏力、食欲缺乏、双下肢水肿3个月,腹胀、右季肋部隐痛2周。既往慢性乙
最新回复
(
0
)