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
79
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
outside!Theywereinside!Theybitpeople!Theycrawledonfood!Thepeopledidn’tknowwhattodo.Somepeoplewantedtok
Whatistheprobablerelationshipbetweenthetwospeakers?
Doyouknowinsurance(保险)?Buyinginsuranceisa【B1】bywhichpeoplecanprotectthemselves【B2】largelosses.Protectionagain
HowdothepeopleinJamaicacarrythings?WhendidJamaicabecomeafreecountry?
Mostoftheanimalshavelittleconnectionwithanimalsofadifferentkind,unlesstheyhuntthemforfood.Sometimes,however,
Whenhewasinthecountryside,he______visitthepoorpeasants.
Thetworoadsmeet______amarketlies.
DearRalph,I’manewcomerhereofasmalltown.Iwould【76】______describemyselfasshyandquietly.B
ItwasinChina______theagreementwassigned.
Shepretended______mewhenIpassedby.
随机试题
足月儿是指
牙髓息肉
全段围堰导流法包括明渠导流、隧洞导流和()。
贷款额度通常按照抵(质)押物的一定抵(质)押率确定的是()。
我国天然白桦林主要分布在东北地区。北京喇叭沟门有一片天然白桦林。下图示意喇叭沟门在北京的位置。据此完成下列问题。北京香山红叶最佳观赏期一般在10月下旬至11月初,那么赴喇叭沟门观赏白桦林金黄色树叶美景的时间宜选在()。
儿童故事的最大特征在于()。
人脑里使人的动作协调准确的是()。
请在【答题】菜单下选择【进入考生文件夹】命令,并按照题目要求完成下面的操作。注意:以下的文件必须都保存在考生文件夹下。中国的人口发展形势非常严峻,为此国家统计局每10年进行一次全国人口普查,以掌握全国人口的增长速度及规模。按照下列要求完
Questions14-17Thetexthas8paragraphs(A-H).Whichparagraphdoeseachofthefollowingheadingsbestfit?Questions18-22
Theconversationmostprobablytakesplace
最新回复
(
0
)