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
The energy which the sun radiates goes in every direction, and only a minute part of it falls on the earth. Even so, it represen
The energy which the sun radiates goes in every direction, and only a minute part of it falls on the earth. Even so, it represen
admin
2011-03-26
24
问题
The energy which the sun radiates goes in every direction, and only a minute part of it falls on the earth. Even so, it represents power of about 5,000,000 horsepower (马力)per square mile per day; the sun gives us as much energy every minute as mankind utilizes in a year. At present, we use this energy in directly, and it is our final source of power. Coal represents the chemical action of the sun on green plants thousands of years ago. Water power results from the rain formed by vapor which comes from the evaporation of power. Coal represents the rain formed by vapor which comes from the evaporation of water under the sunshine. Even windmills operate because of air currents set in motion by the different heating affects of the sun in different places. Some day, through chemistry or some type of solar engine, we shall harness this great source of energy more directly. Already a scientist has worked out an engine, surprisingly efficient, in with the sun’ s rays are concentrated through mirrors on a tube of water to create steam.
How much energy given off by the sun reaches the earth?
选项
A、100 % but indirectly
B、5 %
C、0.5
D、only a very tiny amount
答案
D
解析
转载请注明原文地址:https://kaotiyun.com/show/ZsqC777K
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
苏子曰:“客亦知夫水与月乎?逝者如斯,而未尝往也;盈虚者如彼,而卒莫消长也。盖将自其变者而观之,则天地曾不能以一瞬;自其不变者而观之,则物与我皆无尽也,而又何羡乎?且夫天地之间,物各有主,苟非吾之所有,虽一毫而莫取。惟江上之清风,与山间之明月,耳得之而为声
Medicalcarereformhasbecomethiscountry’smostimportantpublichealth______.
Enidseemstotakegreat______(pleasant)inteachingEnglishasasecondlanguage.
Accordingtotheauthor,feelingdepressedis______.Whatdoestheauthorthinkofthechangeintoday’schildren?
Weshoulddoeverythingpossibletoclearupthemany______(understand)betweenus.
Thispassageismainlyabouthowto______Accordingtothispassage,ifyoucouldnotunderstandapassage,you______
Her______(fluent)inEnglishgivesheranadvantageoverothergirlsforthejob.
WhatwasthehightemperatureinColumbus,OhioonDecember12?Howmanycitieshadatemperaturebelow0°sometimesduringthe
ItwasaquarterpastnineasMariehurriedintotheofficebuildingwhereshewasgoingtowork.Herbusmovedslowlyalongthr
Thepatientsufferingfromcancerlookeddeadbutthefaintpulseprovedthathewasstill
随机试题
问君何能尔?_______。(《饮酒(其五)》)
单模光纤主模的特点是它的()最低。
第一部专门分析方剂的理论专著是
关于引流管/片的拔除时间,不正确的是
患者,男,33岁。患急性腹膜炎,经过积极治疗病情好转,体温下降,今体温突然升高,脉速,并出现典型的膀胱刺激症状,直肠指诊时,在直肠前壁及直肠腔内膨出,有触痛,有时有波动感。应首先考虑的是()
麻黄杏仁甘草石膏汤药物组成中,相反之中寓有相辅之意的两味药是
中国环宇公司与某国艾易达公司签订的国际货物买卖合同中约定,合同争议提交中国国际经济贸易仲裁委员会仲裁,仲裁地在北京。双方未约定仲裁规则及仲裁协议适用的法律。依相关规定和规则.下列哪一选项是正确的?()
【2015年吉林辽源】爱岗敬业是教师职业的本质要求,主要表现是()。
WilliamAppleton,authorofarecentbookentitledFathersandDaughters,believesthatitisawoman’srelationshipwithherfa
Theevolutionofsexratiohasproduced,inmostplantsandanimalswithseparatesexes,approximatelyequalnumbersofmalesan
最新回复
(
0
)