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
2025-03-05
7
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/3984027.html
相关试题推荐
ThewaypeopleintheUStraveltoandfromworkhaschangedalotinthela
ThewaypeopleintheUStraveltoandfromworkhaschangedalotinthela
ThewaypeopleintheUStraveltoandfromworkhaschangedalotinthela
Oneofthebestwaysforpeopletokeepfitisto______healthyeatinghabits.A、g
Fromherepeoplecanseethebridge______construction.A、belowB、byC、underD、on
Today,manypeoplearestarvingtodeath.Thereisashortageoffoodandth
Today,manypeoplearestarvingtodeath.Thereisashortageoffoodandth
Today,manypeoplearestarvingtodeath.Thereisashortageoffoodandth
Today,manypeoplearestarvingtodeath.Thereisashortageoffoodandth
Today,thereisnosuchthingasa"typical"collegestudent.Peopleofall
随机试题
Thedemonstrationisto______.[originaltext]Onthesecondanniversaryofth
Psycholinguisticsisthestudyofthepsychologicalprocessesinvolvedinl
WhichofthefollowingsentencesisINCORRECT?A、Therestofthebicyclesareon
Onthenightoftheplay,Albertwasalreadymade-upand【B1】______inhispolice
当Web服务器访问人数超过了设计访问人数上限时,将可能出现的状态是( )。A.
培养支原体常采用以下何类方法培养A.采用普通培养基中加维生素、胆盐、酵母液 B
2020年12月27日,复兴号动车组C2702次列车从新投用的雄安站准时发出,驶
(2017年真题)借款需求的影响因素主要包括()。A.季节性销售增长 B
关于要约的说法,错误的是()。A.要约到达受要约人时生效 B.要约是以订
()是电气传动系统在扰动信号作用下动态波动恢复时间的定义。A.实际值第一次达到给
最新回复
(
0
)