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
A、A forest looks dark in winter because it absorbs solar energy. B、All living things on the Earth depend on the Sun for their fo
A、A forest looks dark in winter because it absorbs solar energy. B、All living things on the Earth depend on the Sun for their fo
admin
2012-08-10
40
问题
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 energy for our planet. It causes the 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.
Questions 29 to 31 are based on the passage you have just heard.
29. What is the root cause for weather changes on the Earth according to the passage?
30. Why does only a small part of the Sun’s energy reach the Earth’s surface?
31. What do we learn from the passage?
选项
A、A forest looks dark in winter because it absorbs solar energy.
B、All living things on the Earth depend on the Sun for their food.
C、Only 0.023% of the energy from the Sun is made use of on the Earth.
D、Greenhouse gases allow heat energy to escape from the Earth’s surface.
答案
B
解析
短文中提到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,其中all organisms on the Earth表明地球上的所有生物都要依靠太阳提供食物,故答案为B)。
转载请注明原文地址:https://jikaoti.com/ti/LxcFFFFM
0
大学英语四级
相关试题推荐
A、Shehasnotimetomakenewfriends.B、Shedoesn’tlikehernewschool.C、Shehasadaptedeasilytohernewschool.D、Shefeel
Globalreservesoffreshwateradduptomorethan37millioncubickilometers,enoughtofilltheMediterranean10timesover.
OnemajorreasonforGermany’shighunemploymentandtheevidentweaknessofbusinessinvestmentisthenatureofthetaxsystem
A、Topayfortransportation.B、Tomakeaphonecall.C、Todoshopping.D、Togivethemtothewoman.A题目询问男士要用硬币做什么。关键是听到他说“我要用来付
A、Dislikeandhatred.B、Morefreedomandmoremoney.C、Educationsystem.D、Livinginlargetowns.C题目询问以下哪一项说话人不认为是青少年犯罪的原因。这道题考
Spaceisdangerousplace,notonlybecauseofmeteors(流星)butalsobecauseofraysfromthesunandotherStars.Theatmospherea
HowAdvertisementIsDoneThelanguageoftheadvertiserWhenwechooseawordwedomorethangiveinformation;wealsoexp
Internetuseappearstocauseadeclineinpsychologicalwell-being,accordingtoresearchatCarnegieMellonUniversity.Ev
A、Helpful.B、Beneficial.C、Meaningful.D、Pointless.D观点态度题。短文最后提到我们为什么不能包容人类学习经历的多样化,为什么非要彼此对立。由此可知,讲话者认为教育方式应该多元化,争辩是无任何意义的。
TherecessionistakingaserioustollonAmericanretail,bute-commercecouldemergeasawinner.Accordingtoanewrepor
随机试题
2019年7月27日,第七届库布其国际沙漠论坛在内蒙古自治区鄂尔多斯市举办。国家主席习近平在贺信中指出,人类只有一个地球家园,()是关系人类永续发展的伟大事业。
在Word2010中,如果插入表格的内外框线是虚线,假如光标在表格中,要想将框线变为实线,应使用的命令(按钮)是______________。
艾滋病的传播途径不包括
女,6个月,因腹泻4天,呕吐2天而入院。每天排出水样便7~10次,查体:精神萎靡,哭时泪少,尿少,前囟及眼窝凹陷,皮肤弹性差,心肺(-),血钠为135mmol/L。
视锥细胞在何处最密集
关于我国民事诉讼回避制度的规定,下列说法正确的是:()
在网络计划执行过程中,若某项工作比原计划拖后,当拖后的时间大于其拥有的自由时差时,则肯定影响()。
当价值系数V<1时,应采取的措施有()。
重工业增加值比轻工业增加值多了()亿元。以下判断不正确的是()。
思考的人——2011年英译汉及详解Withitsthemethat"Mindisthemasterweaver,"creatingourinnercharacterandoutercircumstances,thebo
最新回复
(
0
)