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
2024-01-16
39
管理
问题
We all know that it is possible for ordinary people to make their homes on the equator (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 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/3366878.html
相关试题推荐
Veryoldpeopledoraisemoralproblemforalmosteveryonewhocomesintoto
Veryoldpeopledoraisemoralproblemforalmosteveryonewhocomesintoto
Veryoldpeopledoraisemoralproblemforalmosteveryonewhocomesintoto
Veryoldpeopledoraisemoralproblemforalmosteveryonewhocomesintoto
Theyoungpeoplewhotalkofthevillageasbeing"dead"aretalkingnothing
Itisnotalwayspossibletoforeseetheobstacles______yourwaytowardsanamb
AsyouarestudentsofEnglish,it’sverypossiblethatyou’11beinteres
AsyouarestudentsofEnglish,it’sverypossiblethatyou’11beinteres
______weallknow,itisimpossibletospeakorwriteEnglishoranyotherlang
Somepeopleseemtohaveaknackforlearninglanguages.Theycanpickupne
随机试题
Itisessentialthathe_____allthefactsfirst.(2014)A、isexaminingB、willexam
[originaltext]Iliveinasmallvillageinthecountry.MywifeandIrunt
Itis1a.m.andthelastcompetitorinthelastroundoftheSantanderPiano
Mostpeoplehaterockmusic.【C1】______Iamnotbynatureanunreasonableor
18岁,晨卧床不起,人事不省,多汗,流涎,呼吸困难。体检:神志不清,双瞳孔缩小如
潜在GDP总是大于实际GDP。()
齐安郡中偶题 杜牧 两竿落日溪桥上,半缕轻烟柳影中。多少绿荷相倚恨,一时回
在对应聘者进行初步筛选时,对于简历的筛选应该着重从()方面人手。A:审查简历的页
根据《抗菌药物临床应用管理办法》,医疗机构对临床应用抗菌药物出现的异常情况,应开
某男性患者,75岁。因牙齿缺失,欲行义齿修复,患者主诉多年来口内多数牙都因龋坏松
最新回复
(
0
)