Question

【题目】根据短文内容，从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。

We experience different forms of the Sun’s energy every day. We can see its light and feel its warmth. __【1】___. 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. These green plants then provide food for all organisms(生物) on the Earth.

Much of the energy that comes from the Sun never reaches the Earth’s surface.__ 【2】__. 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, _【3】___, 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. ___【4】__ 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. _【5】__. 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-coloured surfaces, such as dark soil or forest, absorb more energy and help warm the surrounding air.

A.It is either reflected or absorbed by the gases in the upper atmosphere.

B.approximately 0.023%

C.These gases act like the glass of a greenhouse

D.greenhouse gases allow heat energy to escape from the Earth's surface

E.The amount reflected depends on the surface.

F.The Sun is the major source of energy for our planet

G. they reflect heat energy escaping from the earth back to the earth's surface.

Answer 1

【答案】

【1】F

【2】A

【3】B

【4】C

【5】E

【解析】

试题分析: 太阳是太阳系中唯一的恒星和会发光的天体，是太阳系的中心天体。本文介绍了太阳对我们的重要作用，详细讲述了太阳光对地球的影响等信息

【1】F．细节理解题。由小题1空后文，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. These green plants then provide food for all organisms(生物) on the Earth.得知水从海洋和湖泊蒸发.日光还给绿色植物提供了可使用的能源……等等。由此得知太阳是我们星球能量的主要来源,The Sun is the major source of energy for our planet,故选F

【2】A. 细节理解题。由小题2空后文得知，即从文章第二段首句可知，太阳能只有小部分才能到达地表，大多被表层大气所反射或吸收。It is either reflected or absorbed by the gases in the upper atmosphere最符合文意。故选A

【3】B细节理解题。由第二段30% is reflected by clouds or the Earth’s surface，the remaining 70% warms the surface of the planet得知大致上，阳光30%被云层吸收，剩余70%热能给予地球表面。Only a tiny part， approximately 0.023%仅仅只有0.023%才是用于食物生产。故选B

【4】C细节理解题。由小题4空后文 in that they allow energy from the Sun to enter but prevent energy from leaving得知其功能是让热能进入，且阻止热能散失。these gases act like the glass of a greenhouse这些气体像一个温室。故选C

【5】E细节理解题。由最后一段第三句后的例子得知，热能的吸收取决于不同的地表，雪地，深色土壤和森林都会具有影响。The amount reflected depends on the surface，故选E