首页
登录
职称英语
The air surrounding us is important to everyone. Without air, we could not e
The air surrounding us is important to everyone. Without air, we could not e
游客
2025-07-25
13
管理
问题
The air surrounding us is important to everyone. Without air, we could not exist. Everyone understands that. But air is necessary in many other ways — ways that are not always so obvious or widely known.
If we did not have air, there would be no sound. Sound travels through air. Where there is no air, there is no sound. Without air there would be no fire. There would be no automobiles, since motors need air in order to operate.
Without air, there would be no wind or clouds. The night time would be very cold and the days very hot. We would be forced to seek shelter from the sun, as there would be no atmosphere to protect us from the sun’s deadly rays.
In this huge ocean of air surrounding the earth, there is more energy than in all the coal, oil and gas we have on the earth. Electrical energy is collected in the atmosphere as water is collected and stored in a dam (大坝). The existence of electricity in the air has been known for centuries. Men have gazed in wonder at the bright patterns of lightening in storm clouds. But thorough (彻底的,深入的) study of electricity in the air was not possible until the development of radio. [br] The existence of electricity in the air has been known ______.
选项
A、for hundreds of years
B、for several years
C、recently
D、for thousands of years
答案
A
解析
本题考查对句意的理解。文章第四段第三句“The existence of electricity,in the air has been known for centuries”就是答案所在的地 方。其中,理解for centuries是个关键,其意思是“好几个世纪,好几 百年”,所以答案为[A]。
转载请注明原文地址:https://tihaiku.com/zcyy/4176494.html
相关试题推荐
Whatisconsideredmoreimportantinthedevelopmentofthehuman?[br]Whichof
Whatisconsideredmoreimportantinthedevelopmentofthehuman?[br]Fossils
Drivingcars,trucksandmotorcyclesisanimportantpartofourlives.Wedoit
Morethanoneteacher______toldhimitisimportantthathelearnEnglishwell
【B1】[br]【B20】A、coolB、easyC、difficultD、importantA
【B1】[br]【B16】A、importantB、necessaryC、impossibleD、naturalB
ArtWithoutLimitArtshouldnotbelimitedtoamuseum."Artandcreati
ArtWithoutLimitArtshouldnotbelimitedtoamuseum."Artandcreati
ArtWithoutLimitArtshouldnotbelimitedtoamuseum."Artandcreati
TheErieCanalwasthefirstimportantnationalwaterwaybuiltintheUS.It
随机试题
—Youwillhearfiveshortrecording.—Foreachrecording,decidewhatthespeake
Readingisanimportantskillthatneedstobedevelopedinchildren.Noton
[originaltext]TheUnitedStates’jobmarkethasmillionsofunfilledjobs.
A.43 B.34 C.12 D.14
劳力过度易损伤的内脏是A.心 B.肺 C.脾 D.肾
关于促胰液素的作用,下列哪项是错误的? A.促进肝胆汁分泌B.促进胰液分泌C.
女,26岁。刷牙时牙龈出血3周,停经12周。检查:牙面大量菌斑牙龈红肿,探诊易出
将数值减去均值所得的差除以标准差,所得的统计量为()。A.相关系数 B.标准
下列立法成果中,属于地方性法规的是()。A.《北京市建筑市场管理条例》 B.《
肺炎球菌主要的致病物质是A:荚膜 B:菌毛 C:自溶酶 D:内毒素 E:
最新回复
(
0
)