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
2014-03-16
91
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.
According to the passage, the root cause for weather changes on the earth is ______.
选项
A、the atmosphere surrounding the earth
B、water from oceans and lakes
C、energy from the sun
D、greenhouse gases in the sky
答案
C
解析
事实细节题。由文章第二段The remaining 70%warms…and provides energy for thewater cycle and weather.即“剩余的70%给地球表面提供热,促进水蒸发,给水循环和大气循环提供能量”一句可知答案。故选C。
转载请注明原文地址:https://kaotiyun.com/show/U7wd777K
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
IfirstmetMarythreeyearsagowhenwe______inamiddleschooltogether.
--Whichwillyouhavethen,thewhiteoneortheblueone?--I’lltake______togivemyselfachangesometimes.
Somepeoplesaytheworldissmallerthanbeforebecause______.PeoplelearnbetterthroughTVthanthroughradiobecause___
Thewriterofthetextsuggeststhat______.Youngpeopleshouldbecarefulaskingtheirparentstohelpwithchildcarebecaus
PeopleallovertheworldwritetoBigBen.Theyevensendbirthday’spresents,One
Onesummerdaymyfathersentmetobuywireforourfarm.At16,Iliked【C1】______betterthandrivingourtrack,【C2】______this
GETYOURDEGREEATHOME!HaveyoueverwonderedwhataDegreemightbeworthtoyouinyourjoborcareer?Itmeansalotof
Icanremembertimeswhen,likechildren,mybrothersandI【M1】______wouldallpointatoneanotherwhenaskingwho
Tenyearshaspassedsincewefirst______inShanghai.
Tenyearspassed,andIfoundthathehad______.
随机试题
患儿男性,1岁,主因“发现贫血6个月,发热1天”入院。入院前6个月,常规体检血常规提示:血红蛋白(Hb)87g/L,未予重视,未继续诊治。1天前患儿无明显诱因出现发热,体温最高39℃,伴流涕、咳嗽,无寒战、抽搐、喘息、呕血、黑便等其他伴随症状。血常规:外周
不同食物蛋白质的含氮量稍有不同,平均为()
复合地基中桩的直径为0.36m,桩的间距(中心距)为1.2m,当桩按正方形布置时,面积置换率为()。[2016年真题]
咨询工程师在提交咨询成果阶段的主要工作是()。
安全教育培训的主要方法有()
有关防范措施中,( )不属于质量纠纷的防范措施。
对于可行性研究表述,以下说法错误的是( )。
下列合同或凭证中,应计算缴纳印花税的有()。
调节个人和祖国之间关系的道德要求、政治原则和法律规范的是()
金融资本是由工业垄断资本和银行垄断资本融合在一起而形成的一种垄断资本。金融资本形成的主要途径包括()。
最新回复
(
0
)