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
2025-03-03
19
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 can climb quickly ______
选项
A、in warm air
B、in cold air
C、when it reaches the polar region
D、only when the clouds are down low ______
答案
A
解析
事实细节题。第二段第一句话可知,飞机在冷空气里不如在热空气里飞的高和快。所以选A。
转载请注明原文地址:https://tihaiku.com/zcyy/3981439.html
相关试题推荐
Increasingly,overthepasttenyears,people—especiallyyoungpeople—haveb
Increasingly,overthepasttenyears,people—especiallyyoungpeople—haveb
Increasingly,overthepasttenyears,people—especiallyyoungpeople—haveb
Evenachildknowsthatnoddingheadmeans"Yes".Butsomepeoplewouldprob
Evenachildknowsthatnoddingheadmeans"Yes".Butsomepeoplewouldprob
Evenachildknowsthatnoddingheadmeans"Yes".Butsomepeoplewouldprob
Evenachildknowsthatnoddingheadmeans"Yes".Butsomepeoplewouldprob
Bytheendoflastweek611peoplefrom49countries________toattendthemeetin
Oursocietyhaschangedand________init.A、sothepeoplehaveB、thepeoplehav
Doyouknowinsurance(保险)?Buyinginsuranceisameansbywhichpeoplecanp
随机试题
It’sunusual,ifnotunprecedented,foranewspapertoadviseitsreadersto
关于压痕工艺,下列说法中不正确的是( )。A.可以增强图案的立体感和艺术感染力
(1)淮海战役(2)偷袭珍珠港(3)平型关大捷(4)辽沈战役(5)抗美援朝,按事
要进行有效的控制;必须()。A.给予正确的指导 B.配备合适的人员 C.
A.培养良好的生活习惯 B.心理卫生指导 C.保护胚胎,免受各种有毒有害因素
对单一研究对象的某个或某些方面进行广泛深入研究的方法是( )A.个案法 B.
科技园区包括()。A:软件园区B:硬件园区C:高新园区D:工业园区E:孵
教学口语的语速要适当高于一般人际交往口语的语速,以提高课堂教学的效率。()
甲公司是国有独资公司,根据企业国有资产管理法律制度的规定,下列选项中,不属于甲公
在中性点接地配电网中,对于有火灾、爆炸危险性较大的场所或有独立附设变电站的车间,
最新回复
(
0
)