首页
登录
职称英语
We all know that it is possible for ordinary people to make their homes on t
We all know that it is possible for ordinary people to make their homes on t
游客
2024-01-18
53
管理
问题
We all know that it is possible for ordinary people to make their homes on the equator(赤道),although often they may feel uncomfortably hot there. Millions do it. But as for the North Pole(北极)------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(热带), 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 usually do not need to climb quickly or fly high in the polar region because______.
选项
A、they do not land mere
B、there are no clouds at all
C、they can cross the ice with special equipment
D、it is very cold
答案
B
解析
判断推理题,文中最后一句话说冷空气使云层也降低了,也就是说在高空是没有云的.所以选B。
转载请注明原文地址:https://tihaiku.com/zcyy/3372479.html
相关试题推荐
Manythings______almostimpossibleintheancienttimesareverycommontoday.A、
Fromherepeoplecanseethebridge______construction.A、belowB、byC、underD、on
Manypeoplebelievethatthebuildingshouldbe______intoaschool.A、changedB、a
Saltisasnecessarytolifeaswater.InmanyareasofAfricapeopleonced
Saltisasnecessarytolifeaswater.InmanyareasofAfricapeopleonced
Saltisasnecessarytolifeaswater.InmanyareasofAfricapeopleonced
Saltisasnecessarytolifeaswater.InmanyareasofAfricapeopleonced
电视节目对人们的影响很大,尤其是对儿童。Televisionprogramshaveagreatinfluenceonpeople,partic
Peoplehavewonderedforalongtimehowtheirpersonalitiesandbehaviorsa
Evenachildknowsthatnoddingheadmeans"Yes".ButsomepeopleWouldprob
随机试题
Ifyousmoke-particularlycigarettes-youarefarmorelikelythananon-s
HowtoStudyEnglishinYourDream:theTheoryI.Introduction
PASSAGETWO[br]WhatcontributedtoemploymentproblemsinAmericaaccordingto
I’mgladtosaythatyouhavemadegreat(improve)______inyourpronunciation.
患儿男,7岁,水肿5天,尿蛋白(+++),尿红细胞2个/HP,血白蛋白15g/L
(2018年真题)证券业协会的自律管理体现在保护行业共同利益、促进行业共同发展方
(2019年真题)证券市场监管的意义是()。 Ⅰ、保障广大投资者合法权益的需要
2006年底,全国参加基本医疗保险人数为15737万人,比上年底增加1954万人
某会展中心布置会场,从花卉市场购买郁金香、月季花、牡丹花三种花卉各20盆,每盆均
垄断竞争市场的特点是()。A.较多的卖者和买者 B.存在产品差别 C
最新回复
(
0
)