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
2024-01-17
9
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 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/3369464.html
相关试题推荐
Nuclearscienceshouldbedevelopedtobenefitthepeople______harmthem.A、mor
Ifyouspendoneminutethinkingabouttherealmeaningofwhatpeoplesaytoyo
Saltisasnecessarytolifeaswater.InmanyareasofAfricapeopleonced
Oneofthequalitiesthatmostpeopleadmireinothersisthewillingnessto
Oneofthequalitiesthatmostpeopleadmireinothersisthewillingnessto
Itisimportanttothinkaboutthepeopleofadestinationcountryandhowtouri
Johngotmarriedsixmonthsago,andlikemanyyoungpeoplethesedays,theyare
Wethinkitpossible______thelocalgovernmentwillbeabletosolvethehousing
ThehistoryoftheAmericanpeopleis,【C1】______,thehistoryofthemovemen
ThehistoryoftheAmericanpeopleis,【C1】______,thehistoryofthemovemen
随机试题
Therearemomentsinlifewhenyou【C1】______someonesomuchthatyoujustwa
Theproducersofinstantcoffeefoundtheirproductstronglyresistedinthe
Thiskindofworkishardanddangerous.But______youwouldbecomerich.A、would
[originaltext]M:Idon’tunderstandit.(19)IgotanoticefromthebankthatI
NoonecanlHowardSchultzofinactions
下列关于防火门门扇与门框的搭接量与配合活动间隙的说法正确的有()。A.防火门门
关于限制民事行为能力人订立的合同,叙述错误的是( )。A.限制民事行为能力人订
针对租赁物业的交付与验收,房地产经纪人的注意事项有()。A.如果双方产生矛盾
投资项目决策分析与评价的基本要求包括贯彻落实科学发展观、资料数据准确可靠和()
小动物接触易挥发液态化合物的急性毒性试验,最适宜采用的染毒方法是A.喂饲 B.
最新回复
(
0
)