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
2025-03-10
10
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 me 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 had been traveling 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, this is not true about landings in the polar region (which passenger planes do not make), 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 more above the earth you can always be sure that you will not see a cloud in the sky as far as the eye 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.
Planes can’t climb as high or as quickly in cold air as in warm air. Nor can clouds. (18) In practice, this is an advantage to the plane, which is already at a good height when it reaches the polar region and so does not need to climb, while at the same time cold air keeps the clouds down low. [br] "Millions do it." In this sentence "do it" refers to______.
选项
A、feeling uncomfortably hot on the equator
B、flying over the North Pole
C、flying over the equator
D、making homes on the equator
答案
D
解析
转载请注明原文地址:https://tihaiku.com/zcyy/3990346.html
相关试题推荐
Saltisasnecessarytolifeaswater.InmanyareasofAfricapeopleonced
Saltisasnecessarytolifeaswater.InmanyareasofAfricapeopleonced
Saltisasnecessarytolifeaswater.InmanyareasofAfricapeopleonced
Oneofthequalitiesthatmostpeopleadmireinothersisthewillingnessto
Oneofthequalitiesthatmostpeopleadmireinothersisthewillingnessto
Itisimportanttothinkaboutthepeopleofadestinationcountryandhowtouri
ThehistoryoftheAmericanpeopleis,【C1】______,thehistoryofthemovemen
ThehistoryoftheAmericanpeopleis,【C1】______,thehistoryofthemovemen
ThehistoryoftheAmericanpeopleis,【C1】______,thehistoryofthemovemen
ThehistoryoftheAmericanpeopleis,【C1】______,thehistoryofthemovemen
随机试题
A.selflessB.builtC.complexD.butE.executeF.sustainedG.cheate
Don’tWorry,BeHappyA)Ac
Aftergraduatingfromcollege,mostgraduateshavetofaceadifficultchoic
ApplicationWriteanapplicationofabout50-60wordsbasedonthefollo
砌体坡面防护关键项目为()。A.砂浆强度 B.厚度 C.断面尺寸 D
某企业有—张带息期票,面额为30000元,票面利率为4%,出票日期为4月15日,
患者,男,60岁。主诉心胸憋闷疼痛,并放射至肩背,心悸怔忡,有恐惧感,舌紫有瘀点
不宜制成胶囊的药物是A、酸性液体 B、贵重 C、油类 D、难溶性 E、小
变压器“运行”状态的定义是()。(A)至少有一个相连开关为对应的运行状态,相连
下列条件中,计量基准器具的使用必须具备的条件是()。A.经计量检定合格 B.
最新回复
(
0
)