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
2024-01-17
36
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 trave lling across and around the equator on wheels, on their feet or in ships for thousands of years: but only a few men, with grea tdiff icul ty 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 there
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/3369465.html
相关试题推荐
Ifyouassociatewithsuchpeople,I’mafraidyou______serioustrouble.A、arehea
______workhasbeendonetoimprovepeople’slivingstandard.A、ManyB、Agreatm
Noonegetsoutofthisworldalive,andfewpeoplecomethroughlifewithou
Thereweremanypeoplepresentahidheappearedonlyforafewseconds,soIonl
Todayanyonewillacceptmoneyinexchangeforgoodsandservices.Peopleus
Todayanyonewillacceptmoneyinexchangeforgoodsandservices.Peopleus
Todayanyonewillacceptmoneyinexchangeforgoodsandservices.Peopleus
Whenwewantto【C1】______otherpeoplewhatwethink,wecandoitnotonlyw
Whenwewantto【C1】______otherpeoplewhatwethink,wecandoitnotonlyw
Whenwewantto【C1】______otherpeoplewhatwethink,wecandoitnotonlyw
随机试题
【B1】[br]【B3】A、infollowB、infollowingC、asfollowsD、asfollowingCasfollows
"Almostuniversally,womenhavefailedtoreachleadingpositionsinmajor
Governmentreports,examinationcompositions,legaldocumentsandmostbusiness
BlowingHotandColdClimatechangemaybes
UnderstandingTypesofPoemsI.EpicpoemsA.Definition:—
(1)"ITisanevilinfluenceontheyouthofourcountry."Apoliticiancond
系统法的不足在于容易造成信息数据的重复或遗漏。()
关于普鲁卡因静脉复合麻醉哪项不正确A.操作简单 B.用药量大 C.对肝功能无
海洋观测是了解认识海洋自然和环境特征的基本手段,我国在东海建立了第一个海底综合观
男性,1岁,因发育落后来诊。查体:皮肤细嫩,眼距宽、鼻梁扁平、舌常伸出口外,小拇
最新回复
(
0
)