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
2024-01-19
16
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:https://tihaiku.com/zcyy/3376416.html
相关试题推荐
[originaltext]IfanewideainAmericabecomesalaw,peoplewhosufferfro
[originaltext]IfanewideainAmericabecomesalaw,peoplewhosufferfro
[originaltext]IfanewideainAmericabecomesalaw,peoplewhosufferfro
[originaltext]IfanewideainAmericabecomesalaw,peoplewhosufferfro
[originaltext]IfanewideainAmericabecomesalaw,peoplewhosufferfrom
[originaltext]Somepeoplecangetmotionsicknessfrombeinginmovingvehic
[originaltext]Thousandsofpeoplelivinginvillagesclosesttothevolcano
[originaltext]Thousandsofpeoplelivinginvillagesclosesttothevolcano
[originaltext]TheWorldSantaClausCongressisdesignedforpeoplewhoenj
[originaltext](1)InNewSouthWales,Australia,nineteenpeopleincluding
随机试题
EatingDisorders:FactsAboutEatingDisordersandtheSearchforSoluti
[audioFiles]audio_eusm_j01_337(20099)[/audioFiles]A、Theoldhousesshouldbetu
对于有卸载机构的大、中型活塞式制冷压缩机来说,采用()方法调节冷量。A.滑阀
1、资料(一) 鑫龙制药(集团)有限公司(以下简称鑫龙制药或公司)是一家较早成
凡两经或三经的病证同时出现者为A.卒发 B.伏发 C.合病 D.并病 E
患者,男性,18岁。确诊金黄色葡萄球菌引起的急性骨髓炎。最佳选药应是A.庆大霉素
使用冰袋降温时,以下护理措施不妥的是A.随时观察冰袋有无漏水 B.冰块融化后应
贾律师在一起未成年人盗窃案件辩护意见中写到:“首先,被告人刘某只是为了满足其上网
某工程施工合同约定根据价格调整公式调整合同价,已知不调值部分占合同价的比例为15
竣工图是水利工程档案的重要组成部分,其中的项目总平面图应由()进行编制。A.施
最新回复
(
0
)