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
专升本
We ail know that it is possible for ordinary people to make their homes on the equator (赤道) ,although often they may feel uncomf
We ail know that it is possible for ordinary people to make their homes on the equator (赤道) ,although often they may feel uncomf
admin
2011-05-26
20
问题
We ail 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. (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)
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://jikaoti.com/ti/KR4GFFFM
本试题收录于:
英语题库成考专升本分类
0
英语
成考专升本
相关试题推荐
阅读鲁迅的《灯下漫笔》中的作品片段,回答问题。任凭你爱排场的学者们怎样铺张,修史时候设些什么“汉族发祥时代”“汉族发达时代”“汉族中兴时代”的好题目,好意诚然是可感的,但措辞太绕弯子了。有更其直捷了当的说法在这里——一,想做奴隶而不得的
Insteadofresearchingandwritingtheirpapers,somestudents______.Outof300paperscheckedforfakes,______.
Accordingtothepassage,cultureshock______.WhichoneofthefollowingmayNOTbeasymptomofcultureshock?
Cultureshockisanoccupationaldisease(职业病)forpeoplewhohavebeensuddenlytransplantedabroad.Cultureshockiscaused
Anystudenthavinga______interestinsportscanapplyformembershipintheclub.
Whilemakingtremendousachievementsatcollege,Asian-Americanstudents______.Whydo"bothexplanations"(Line1,Para.3)w
Childrenhaveanatural______(curious)abouttheworldaroundthem.
Hedidn’tgototheparty.Nowheregrets______so.
Icannotfindmyumbrella.Imusthave______itonthebusyesterday.
Tohavesomerestandrelaxation,Ilaybackandreadmyfavoritesportsmagazine______leisure.
随机试题
锯齿形牙嵌离合器可以传递双向转矩。()
心梗行肝素抗凝治疗时,下列哪项措施是错误的
下列关于腐蚀性食管灼伤的叙述,正确的是()
老年心力衰竭患者症状加重最常见的诱因是
我国能源“十一五”发展规划确定的建设重点有()。
只有执行了审慎的贷款分类制度,才能计提充足的贷款损失准备金。()
不断提高经理人员的工资和奖金,使之分享企业增加的财富,他们就会和股东的目标保持一致。()
要约和承诺是()要经过的两个主要步骤。
公众对于高校去行政化推进艰难的_______,与对中大学生会任命干部官僚化做法的普遍反感,形成了强烈的对比。这种反差,真实而具体地体现了国人对于后代教育的重视程度:一些不合理之事,强加于大人们可以,污染年轻的孩子们不行。正是这种全社会对于教育应该保存和追求
设A=(α1,α2,α3)为三阶矩阵,且|A|=3,则|α1+2α2,α2-3α3,α3+2α1|=_______.
最新回复
(
0
)