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
2024-01-20
56
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. (76) 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. (77) 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:http://tihaiku.com/zcyy/3377823.html
相关试题推荐
[originaltext]Doyourememberatimewhenpeoplewerealittlenicerandge
[originaltext]M:WhenIsayIliveinSweden,peoplealwayswanttoknowabout
[originaltext]M:WhenIsayIliveinSweden,peoplealwayswanttoknowabout
[originaltext]Upto32peoplewerekilledintwobombattacksMondayinthe
[originaltext]Upto32peoplewerekilledintwobombattacksMondayinthe
[originaltext]Aresomepeoplebornclever,andothersbornstupid?Oristh
[originaltext]Manypeoplesufferfromsomeformofextremeanxiety.Someex
[originaltext]Manypeoplesufferfromsomeformofextremeanxiety.Someex
[originaltext]Manypeoplesufferfromsomeformofextremeanxiety.Someex
[originaltext]Approximately90%ofpeopleintheworldarenaturallyright-
随机试题
PassageOne(1)IwassurethatIhadfoundatlasttheonetruecosmopol
Whatisthemaintopicofthetalk?Themaintopicofthistalkistoofferadvi
LaborDayisanationalholidayintheUnitedStates.Ithasbeencelebrated
[originaltext]W:Hasthelatestmagazinearrivedyet?Today’salreadyTuesday.
在教学中为了实现知识的迁移,教师应该应用( ),使学生在学习和思维中将事物的非本
A. B. C. D.
平静呼吸时,肺内压在哪一时相中低于大气压?A.吸气初 B.吸气末 C.
在MMPI-2中,新增的效度量表包括()。 (A)PK(B)Fb (
当财务报表存在与应披露而未披露信息相关的重大错报时,下列各项中,注册会计师的做法
慢性肾功能不全出现肾性贫血最合适的治疗药物是( )。A.口服碳酸钙 B.必需
最新回复
(
0
)