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
What is the major source of evaporation of water from the oceans and lakes?
What is the major source of evaporation of water from the oceans and lakes?
admin
2010-08-07
12
问题
What is the major source of evaporation of water from the oceans and lakes?
We experience different forms of the Sun’s energy every day. We can see its light and feel its warmth. The Sun is the major source of evaporation of water from the oceans and lakes. Sunlight also provides the energy used by green plants to make their own food. These green plants then provide food for all organisms on the Earth.
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. For example, you’ve probably noticed how bright snow is when sunlight falls on it. Snow reflects most of the energy from the Sun, so it contributes to the low temperatures of winter. Dark-colored surfaces, such as dark soil or forest, absorb more energy and help warm the surrounding air.
选项
A、They allow energy from the sun to enter but prevent energy from leaving.
B、They allow energy from the sun to leave but prevent energy from entering.
C、They protect the plants.
D、They protect the earth.
答案
A
解析
细节题。根据回答“…but prevent energy from leaving.”可知本题答案为A。
转载请注明原文地址:https://jikaoti.com/ti/mvasFFFM
本试题收录于:
公共英语四级笔试题库公共英语(PETS)分类
0
公共英语四级笔试
公共英语(PETS)
相关试题推荐
8
Whichofthefollowingcanreflecttheever-changingethnicstructureofAmerica?Theauthorofthepassagewantstotellusth
Thepassageischieflyabout______.Thedeep-sealisteningsystemmakesuseof______.
Accordingtotheauthor,theconventionalnotionofintelligencemeasuredintermsofone’sabilitytoread,writeandcompute
Whichofthefollowinglawisrelatedtoeducation?Peoplefavortheindependenceofschoolforthereasonthat
WiththerapiddevelopmentoftheInternet,moreandmorepeoplehaveaccesstoitforinformation,entertainmentandeveneduca
TheU.S.SupremeCourthasforbiddenprayersinpublicschools,butmanyAmericansclingtotheideathattheireducationalsys
ThreedevelopmentsintheUnitedStateshighereducationstartedmorethanacenturyagofollowingthe______.
Mostpublishingisnow"electronic"inthesensethatbooks,magazinesandnewspapersarepreparedoncomputers,andexistasco
Mostpublishingisnow"electronic"inthesensethatbooks,magazinesandnewspapersarepreparedoncomputers,andexistasco
随机试题
儿童原发性肾病综合征最常见的病理类型是
视神经孔后前轴位摄影,矢状面与台面呈
在经络系统中,具有离、入、出、合循行特点的是
土石坝碾压方式中的()操作简便,碾压、铺土和质检等工序协调,便于分段流水作业,压实质量容易保证。
助听器
青海()是格萨尔文化的主要发祥地,被誉为“中国格萨尔文化之乡”。
行政复议机关收到行政复议申请后,应当在()内进行审查,决定是否受理。
《边城》是哪位作家的代表作?()
荷兰伊拉斯漠斯大学医学中心的研究人员在对1.8万人进行调查并研究后发现,如果体内“CYPIAl”和“NRCAM”这两种基因表现活跃,人就会爱喝咖啡,而且不太容易出现大量摄入咖啡因后的不良感觉。因此,爱喝咖啡可能与基因有关。下列各项如果为真,最能支持题干观点
简述法律保障自由的方式。
最新回复
(
0
)