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 represe
The energy which the sun radiates goes in every direction , and only a minute part of it falls on the earth. Even so, it represe
admin
2010-07-11
28
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 indirectly, and it is our final source of power. Coal represents the chemical action of the sun on green plants thousands of years ago. Waterpower results from 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 effects 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 which 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
细节题。本题问太阳发出的能量有多少传到了地球上。根据文章第一句可知D。只有一小部分是对的。
转载请注明原文地址:https://kaotiyun.com/show/nALC777K
本试题收录于:
英语题库普高专升本分类
0
英语
普高专升本
相关试题推荐
Theskillsandthirstforhuntingremained,however,anddemandednewoutlets.
Withatremendousroarfromitsrocketengine,thesatelliteissentupintothesky.Minuteslater,atanaltitudeof300miles
Manyteachersbelievethattheresponsibilitiesforlearningliewiththestudent.【51】alongreadingassignmentisgiven,instru
A、WhatanAssignmentB、WhataWasteC、HowtoSaveEnergyD、TheFutureisDimB主旨题。通过阅读,我们发现作者试图警醒我们对于家庭中能源浪费的忽视。
Itisusefultobeabletopredicttheextenttowhichapricechangewillaffectsupplyanddemand.
Banksarenotordinarilypreparedtopayoutallaccounts:theyrelyondepositors(储户)nottodemandpaymentallatthesametime
Banksarenotordinarilypreparedtopayoutallaccounts:theyrelyondepositors(储户)nottodemandpaymentallatthesametime
Theworkers’demandsare______;theyareaskingforonlyasmallincreaseintheirwages.
Thedemandforforeignexchangearisesbecauseacountry’sresidentswanttobuyforeigngoods.
随机试题
男,26岁。饱餐后剧烈活动时腹痛2小时,持续性痛阵发性加剧,脐周伴腰背痛,呕吐频繁,吐后症状无缓解。腹肌紧张,脐周有压痛及反跳痛,肠鸣音亢进,有气过水声。最可能的诊断是
下列哪项属于渐进镜的缺点
下列关于密闭空间里温度与相对湿度关系的说法中,正确的是()。
气体的质量传递是借助于气体扩散来完成的,扩散的两种形式是( )
在野外常见的边坡变形破坏类型中,边坡岩体主要在重力作用下向临空方向发生长期缓慢的塑性变形现象,称为()。
根据国家有关规定,()等处应当设置明显的安全警示标志。
20世纪90年代以后,证券投资基金在世界范围内得到普及性发展,基:金业的快速扩张正在成为一种国际性的现象。( )
某公司将税务机关确定的应于2001年12月5日缴纳的税款20万元拖至12月15日缴纳,根据我国《税收征管法》的规定,税务机关依法加收该公司滞纳税款的滞纳金为( )元。
唯物辩证法与形而上学的对立表现在是否承认()。
首次把生态文明建设纳入中国特色社会主义事业五位一体总体布局,使生态文明建设的战略地位更加突出的是()。
最新回复
(
0
)