首页
登录
职称英语
We all know that it is possible for ordinary people to make their homes on th
We all know that it is possible for ordinary people to make their homes on th
游客
2024-01-14
64
管理
问题
We all know that it is possible for ordinary people to make their homes on the equator, although often they may feel uncomfortably hot there. Millions do it. But as for the North Pole—we know that it is not only a dangerously cold place, but that people like you and I would find it quite impossible to live there. At the present time only the scientists and explorers can do so, and they use special equipment. Men have been travelling across and around the equator on wheels, on their feet or in ships for thousands of years: but only a few men, with great difficulty and in very recent time, have ever crossed the ice to the North Pole. So it may surprise you to learn that, when traveling by air, it is really safer to fly over the North Pole than over the equator. Of course, it is not true about landings in the polar region, but the weather, if we are flying at a height of 5 , 000 meters above the Pole is a delight. At 4, 000 meters and move above the earth you can always be sure that you will not see a cloud in the sky as far as your eyes can reach. In the tropics, on the other hand, you are not certain to keep clear of bad weather even at such heights as 18, 000 or 20, 000 meters.
Aeroplanes can’ t climb as high or as quickly in cold air as in warm. Nor can clouds. In practice , this is an advantage to the aeroplane, which is already at a good height when it reaches the polar region and so does not to climb, while at the same time cold air keeps the clouds down low. [br] Aeroplanes can climb quickly______.
选项
A、in warm air
B、in cold air
C、when it reaches the polar region
D、only when the clouds are down low
答案
A
解析
根据文章第二段第一句“Aeroplanes can’t climb as high or as quickly in cold air as in warm.”可知,飞机在冷空气里不如在热空气里飞的高和快。故选A。
转载请注明原文地址:https://tihaiku.com/zcyy/3361582.html
相关试题推荐
Thoughsomepeoplehavesuggestedthatwomenshouldreturntohouseworkino
Thereasonwhysomepeopleareunlikelytosucceedinlifeisthatthey______.
Thereasonwhysomepeopleareunlikelytosucceedinlifeisthatthey______.
Thereasonwhysomepeopleareunlikelytosucceedinlifeisthatthey______.
WhatisthemajorfunctionofParagraph1?[br]WhyaresomepeopleagainstTV?A
Firecanhelppeopleinmanyways.Butitcanalsobeverydangerous.Firec
Firecanhelppeopleinmanyways.Butitcanalsobeverydangerous.Firec
Firecanhelppeopleinmanyways.Butitcanalsobeverydangerous.Firec
WhentheterroristattackonSeptember11thcausedpeopletofleethebuildi
WhentheterroristattackonSeptember11thcausedpeopletofleethebuildi
随机试题
In1959,Hawaiibecamethefiftiethstateintheunion(1)_____Congresssof
[originaltext]Thediamondisconsideredthemostfamousandvaluablejewel
A. B. C. D.
协调能力是单纯的运动素质。()
由于第三人的原因导致合同一方违约的,未违约方应当向( )主张承担违约责任。A.
患儿,女,5岁。咳嗽痰多,色黄黏稠,难以咯出,发热口渴,烦躁不安,尿少色黄,大便
如何提高职业院校毕业生的就业率?
Thechangeinthatvillagewasmiraculou
电子政务在实现资源共享的同时,可以从根本上规范政府行为,避免暗箱操作,减少()。
票据保证的目的是担保其他票据债务的履行,适用于汇票、本票和支票。( )
最新回复
(
0
)