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 experience different forms of the sun’ s energy every day. The sun is the major source of energy for our planet. It causes th
We experience different forms of the sun’ s energy every day. The sun is the major source of energy for our planet. It causes th
admin
2012-10-16
27
问题
We experience different forms of the sun’ s energy every day. The sun is the major source of energy for our planet. It causes the evaporation (蒸发) of water from the oceans and lakes. Sunlight also provides the energy used by green plants to make their own food.
Much of the energy that comes from the sun never reaches the earth’ s surface. It is either reflected or absorbed by the gases in the upper atmosphere. Of the energy that reaches the lower atmosphere, 30%is reflected by clouds or the earth’ s surface. The remaining 70% warms the surface of the planet, causes water to evaporate, and provides energy for the water cycle and weather. Only a tiny part, approximately 0.023% , is actually used by green plants to produce food.
Many gases found in the atmosphere actually reflect heat energy escaping from the earth’ s surface back to the earth. These gases act like the glass of a greenhouse in that they allow energy from the sun to enter but prevent energy from leaving. They are therefore called greenhouse gases.
When sunlight strikes an object, some of the energy is absorbed and some is reflected. The amount reflected depends on the surface. Dark-colored surfaces, such as dark soil or forest, absorb more energy.
Only a small part of the sun’ s energy reaches the earth’ s surface because most of it is______.
选项
A、absorbed by the clouds in the lower atmosphere
B、reflected by the gases in the upper atmosphere
C、lost in the upper and lower atmosphere
D、used to evaporate water from the oceans and lakes
答案
B
解析
事实细节题。由第二段第二、三句话可知太阳的多数能量是被高空中的大气反射或者吸收。故选B。
转载请注明原文地址:https://kaotiyun.com/show/Xvwd777K
本试题收录于:
公共英语二级笔试题库公共英语(PETS)分类
0
公共英语二级笔试
公共英语(PETS)
相关试题推荐
情景:假定你的名字是李文山,你最近刚在网上认识一个朋友,名叫王刚。他想知道许多关于你的事情,给他写一封100词左右的短信,向他介绍你的情况,这包括你的生活习惯,兴趣爱好,学习情况等等。
【B1】【B18】
WhywasHenryFordabletosellmillionsofcars?
Wheredoesthisconversationmostlikelytakeplace?
Whatdoestheunderlinedword"gang"(Line2,Para.2)probablymean?Whatdoesthetextmainlytalkabout?
Whatisthecompanygoingtodo?
InJanuary2002,duringthefirstweeksofasix-monthstayattheChildren’sHospitalofPhiladelphiaforleukemia(白血病)treatm
A、Somethingcanbedonetokeepourcomputerssafe.B、Evenane-mailattachmentcomingfromafriendmaynotbesafetoopen.C、
Didthemanhaveabadheadache?
随机试题
甲石膏矿是由陈某个人投资拥有的一家集体企业,位于A县B乡石膏矿区北段。建设规模为30×104t/a,投资3000万元,于2004,年11月19日开工建设,2006年建成投产。该矿区地质情况复杂,主要受断层和软岩以及地下含水层影响。矿区内一条大的断裂破碎带
固体颗粒能通过架桥形成泥饼时要求颗粒粒径()。
简述艺术传播的构成要素。
患者,男性,73岁,因小便不能自解10h入院,询问病史得知,在此次发病之前,每隔1h左右要解小便一次,尿频,10h前因呃逆不止肌内注射阿托品0.5mg后出现尿意,但不能自解,诊断为前列腺增生,遂行前列腺切除术。术后控制出血的主要措施是
拆迁补偿安置资金应当主要用于房屋拆迁的补偿安置,不得挪作他用。()
背景某安装公司承包某制药厂生产设备工程的施工,该制药厂生产设备的主机及控制设备由建设单位从国外订货。制药厂生产设备的主机设备土建工程及机电配套工程由某建筑公司承建,已基本完工。安装公司进场后,按合同工期要求,与建设单位和制药厂生产设备主机及控制设备供应商
3,4,9,12,15,(),21,108。
甲教唆乙去杀丙,乙同意并做好准备后,甲反而后悔了,并劝说乙放弃杀丙的计划,乙不听,仍去杀死了丙。甲的教唆行为属于()。
上层建筑既具有对经济基础的依赖性,又具有相对独立性,这就使上层建筑不会完全地、绝对地适应经济基础的需要,它们之间总会有矛盾。这种矛盾表现在
It’sclearthatsocialmedialikeTwitterandFacebookarechangingthewaywelive.Indeed,wemightfeelasifwearesudd
最新回复
(
0
)