Question

All living things on the earth need other living things to live. Nothing lives alone. Most animals must live in a group, and even a plant grows close together with others of the same kind. Sometimes one living thing kills another, one eats and the other is eaten. Each kind of life eats another kind of life in order to live, and together they create a food chain (鏈條). Some food chains are simple, while others are not. But all food chains begin with the sun, and all food chains become broken up if one of the links (鏈接) disappears.

All life needs sunlight to live on. But only plants can use sunlight directly. Plants are ‘factories’. They make food from sunlight, water and things in the soil (土壤) and air. Plants feed all other living things. Animals can only use the sun’s energy after it has been changed into food by plants. Some animals feed directly on plants, others eat smaller animals. Meat-eating animals are only eating plants indirectly.

What about humans? We are members of many food chains. We eat rice, vegetables, and fruits and so on. We also eat meat and drink milk. But we often break up the food chains. We kill wild animals and also make rivers, lakes and seas polluted. When these rivers, lakes and seas are polluted, the fish in them can not be eaten. If we eat the fish, we will get strange illnesses.

Each form of life is linked (關(guān)聯(lián)的) to all others. Breaking the links puts all life in danger.

1.Which living things can use the sun’s energy directly?

A．Animals.	B．Plants.
C．Animals and plants.	D．All living things.

2.Who often destroy the food chains?

A．Humans.	B．Animals.
C．Plants and animals.	D．Humans and wild animals.

3.Which of the following would be the best title for this passage?

A．The Sun’s Energy	B．Plants
C．Food Chains	D．Living Things

 

Answer 1

【答案】

1.B

2.A

3.C

【解析】

試題分析：

1.本文的第二段第一行有一句But only plants can use sunlight directly.意思為只有植物直接使用陽光，故本題選B。

2.本文的第三段第二行提到人類有一句we often break up the food chains，意思為我們經(jīng)常破會食物鏈，故本題選A。

3.本文談?wù)摿藙游�，植物和人類以及它們之間的食物關(guān)系，主要談?wù)摰氖鞘澄镦�，故本題選C。

考點(diǎn)：本文是一篇介紹食物鏈的說明文。

點(diǎn)評：本文主要介紹了地球上的生命體都需要食物來維持生存，不同種類的生物是以食物為基點(diǎn)而相互聯(lián)系，相互依存，但人類通常破壞這種平衡，從而導(dǎo)致自身的問題，每個生命體是相互依存的，破壞這種平衡會使所有的生命面臨著危險，閱讀本文時，應(yīng)以這種食物關(guān)系而通讀全篇，理解本文的主要內(nèi)容，達(dá)到問題的解決。