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
A、Because there planes fly higher than at the equator. B、Because there the eyes can reach about 4,000 metres. C、Because there pl
A、Because there planes fly higher than at the equator. B、Because there the eyes can reach about 4,000 metres. C、Because there pl
admin
2009-04-23
58
问题
We all know that it is possible for ordinary people to make their homes on the equator, although often they may feel uncomfortably hot there. Millions do it. But as for the North Pole, we know that it is not only a dangerously cold place, but that people like you and me 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 traveling 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, this is not true about landings in the polar region(which passenger airplane do not make), 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 more above the earth you can always be sure that you will not see a cloud in the sky as far as the eye can reach. In the tropics, on the other hand, you are not certain to keep clear of bad weather even at such heights as 18,000 or 20,000 metres.
Aeroplane 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 aero plane, which is already at a good height when it reaches the polar region and so does not need to climb, while at the same time cold air keeps the clouds down low.
选项
A、Because there planes fly higher than at the equator.
B、Because there the eyes can reach about 4,000 metres.
C、Because there planes are clear of bad weather.
D、Because there planes fly more quickly than at the equator.
答案
C
解析
Why is it a delight to fly at the Pole?
转载请注明原文地址:https://kaotiyun.com/show/X4C7777K
0
大学英语四级
相关试题推荐
A、Ahomefire.B、Anexplosion.C、Amurder.D、Acaraccident.D从选项内容可猜测题目与某起灾难有关。短文说,RayAnderson目睹卡车司机闯红灯撞了另一辆车,故答案是D。
A、Checkyournumberandcallagain.B、Telltheoperatorwhathashappened.C、Asktheoperatortoputyouthrough.D、Asktheoper
A、Toknowhowmanyextramedicalstaffareneeded.B、Toclarifytheresponsibilityofgovernment.C、Tofindoutwhatpeoplereal
A、Avoidjunkfood.B、Attendmonthlymeetings.C、Buycleaningsupplies.D、Workattheco-op.D四个选项都是动词原形,一般这种题目问建议、打算或将要做的事。男士问“成
AtayouthcentreinsouthLondon,wherestaffandvolunteersrunadailyafter-schoolhomeworkclub,youngpeopleturnoffthei
Thekeyelementtosuccessfulinterviewingisnotyourexperience,yourgrades,whatclassesyoutook,yourextracurricularacti
A)Oneofthelittleritualsallinternationaltravelersgothroughiscustoms.Tomostpeople,thisisjustanotherstopinan
A、Toteachatauniversity.B、Topatenthisinventions.C、Tospendhisremainingyears.D、Tohaveathree-weekholiday.A
A、Itwillbeonthefollowingweekend.B、Itwillbeoutintothecountryside.C、Itwilllastonlyoneday.D、Itwillstarttomor
A、Parents.B、Children.C、Payscales.D、Managementsystems.C
随机试题
高频喷射通气的特点是:①______________;②______________;③______________;④______________。
A.CDP-乙醇胺B.CDP-胆碱C.UDP-乙醇胺D.磷脂酰甘油合成卵磷脂时所需的活性碱基是
干缩性较大,适用于有抗渗要求、大体积的工程,不宜用于耐磨性要求高的工程的水泥是()。
下列通信施工企业的高管人员中,()应参加相关部门组织的安全生产考核并取得合格证书。
金融市场是金融工具交易的场所,下列不属于金融市场的是()。
下列不属于会计信息披露在公司治理结构中的作用的是()。
下列疾病可导致心肌间质中出现大量淋巴单核细胞浸润的是
简述关于教育目的的主要理论。
InDecember1653,byanInstrumentofGovernment,OliverCromwellbecame______oftheCommonwealthofEngland.
A、Itislessening.B、Itisgrowing.C、Ithasn’tchanged.D、Itisslowlychanging.B短文开头介绍,在1986年出台了禁止商业捕鲸的政策之后,鲸鱼的死亡数字每年都呈上升趋势,故
最新回复
(
0
)