Question

【題目】A rainforest is an area covered by tall trees with the total high rainfall spreading quite equally through the year and the temperature rarely dipping below l6℃. Rainforests have a great effect on the world environment because they can take in heat from the sun and adjust the climate. Without the forest cover，these areas would reflect more heat into the atmosphere, warming the rest of the world. Losing the rainforests may also influence wind and rainfall patterns，potentially causing certain natural disasters all over the world.

In the past hundred years，humans have begun destroying rainforests in search of three major resources（資源）: land for crops，wood for paper and other products，land for raising farm animals. This action affects the environment as a whole. For example，a lot of carbon dioxide（二氧化碳）in the air comes from burning the rainforests. People obviously have a need for the resources we gain from cutting trees but we will suffer much more than we will benefit.

There are two main reasons for this. Firstly，when people cut down trees，generally they can only use the land for a year or two. Secondly，cutting large sections of rainforests may provide a good supply of wood right now，but in the long run it actually reduces the world’s wood supply.

Rainforests are often called the world’s drug store. More than 25％ of the medicines we use today come from plants in rainforests. However，fewer than l％of rainforest plants have been examined for their medical value. It is extremely likely that our best chance to cure diseases lies somewhere in the world’s shrinking (萎縮的) rainforests.

【1】Rainforests can help to adjust the climate because they .

A. reflect more heat into the atmosphere

B. bring about high rainfall throughout the world

C. rarely cause the temperature to drop lower than l6℃

D. reduce the effect of heat from the sun on the earth

【2】What does the word “this” underlined in the third paragraph refer to?

A. We will lose much more than we can gain.

B. Humans have begun destroying rainforests.

C. People have a strong desire for resources.

D. Much carbon dioxide comes from burning rainforests.

【3】It can be inferred from the text that __________________.

A. we can get enough resources without rainforests

B. there is great medicine potential in rainforests

C. we will grow fewer kinds of crops in the gained land

D. the level of annual rainfall affects wind patterns

【4】What might be the best title for the text?

A. How to Save Rainforests

B. How to Protect Nature

C. Rainforests and the Environment

D. Rainforests and Medical Development

Answer 1

【答案】

【1】D

【2】A

【3】B

【4】C

【解析】

試題分析：本文敘述了熱帶雨林在人們生活中的重要作用，它們能吸收太陽(yáng)光調(diào)節(jié)地球上的溫度，減少人類(lèi)得病，還能提供一些藥用的植物藥材為人類(lèi)治病，因此，我們要保護(hù)熱帶雨林，不要濫墾濫伐。

【1】D細(xì)節(jié)理解題。根據(jù)Rainforests have a great effect on the world environment because they can take in heat from the sun and adjust the climate.熱帶雨林有一個(gè)很大的影響對(duì)于世界環(huán)境,因?yàn)樗麄兡芪�收�?lái)自太陽(yáng)的熱量,調(diào)節(jié)氣候。故選D.

【2】A詞義猜測(cè)題。根據(jù)People obviously have a need for the resources we gain from cutting trees but we will suffer much more than we will benefit.可知這樣會(huì)得不償失，劃線詞語(yǔ)指代此意，故選A

【3】B推理判斷題。根據(jù)More than 25％ of the medicines we use today come from plants in rainforests. However，fewer than l％of rainforest plants have been examined for their medical value. It is extremely likely that our best chance to cure diseases lies somewhere in the world’s shrinking rainforests.熱帶雨林里有很多的藥用植物供我們開(kāi)采利用，故選B.

【4】C主旨大意題。根據(jù)全篇短文的內(nèi)容來(lái)看主要說(shuō)的是熱帶雨林和環(huán)境，故選C.