首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
We all know that it is possible for ordinary people to make their homes on the equator(赤道), although often they may feel uncomfo
We all know that it is possible for ordinary people to make their homes on the equator(赤道), although often they may feel uncomfo
admin
2016-04-30
37
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.
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://kaotiyun.com/show/j8RO777K
0
成人本科学位英语
相关试题推荐
(76)Somepeoplearguethatthepressureoninternationalsportsmenandsportswomenkillstheessenceofsport—thepursuitofpe
Oneofthequalitiesthatmostpeopleadmireinothersisthewillingnesstoadmitone’smistakes.(79)Itisextremelyhardsom
A(Lateron),childrenB(attemptto)maketheirpaintingsC(lookasclosely)aspossibleD(totherealthings)theyarerepresent
Lookingbackonmychildhood,Iamconvincedthatnaturalistsarebornandnotmade.Althoughwewerebroughtupinthesameway
Scientistsfindthathard-workingpeoplelivelongerthanaveragemenandwomen.Careerwomenarehealthierthanhousewives.Evi
Therearemanyolderpeopleintheworldandtherewillbemanymore.Alittle-knownfactisthatover60percentoftheolderp
Sportsandgamesmakeourbodiesstrong,preventusfromgettingtoofat,andkeepushealthy.Buttherearenottheironlyuse.
Intoday’snewspaper,it______thattherewillbestrongwindthisafternoon.
Howcloseparentsaretotheirchildren______astronginfluenceonthedevelopmentofthechildren’scharacter.
Anti-drugworkhasbecomea______ofattentionamongtheinternationalcommunitywiththespreadofdrugabuseintheworld.
随机试题
关于路基工程石方施工安全要点的说法错误的是()。
下列事实中,构成无因管理之债的事实是()。
玻璃钢是一种以玻璃纤维为增强剂,以合成树脂为粘结剂制成的复合材料,具有( )和实用性强等优点。
建设工程管理的核心任务是()。
某建筑物1999年4月开工建设,2000年4月因故停工,2000年10月复工,2001年2月竣工验收合格。该建筑物耐用年限应自( )起计算。
()人民政府公安机关,为预防和制止严重危害社会治安秩序的行为,可以在一定的区域和时间,限制人员、车辆的通行或停留,必要时可以采取相应的交通管制措施。
根据以下资料,回答下列问题。2008年某市科技活动经费支出305.2亿元,按可比口径计算,比上年增长6.7%。按隶属关系分:中央在该市单位224.5亿元,占总计的73.6%;地方属单位80.7亿元,占26.4%。按单位类型分:科研机构159.0亿元,占5
以下可以判断是否在文本框(名称为Text1)内按下了回车键的事件过程是
Whatdoesthewomanwanttoknow?
A、Theycomeinagreatvariety.B、Theydonotmakedecentgifts.C、Theydonotvarymuchinprice.D、TheygowellwithItalianf
最新回复
(
0
)