Why do plants grow in some places and not in others? Why does some land have so much growing on it, while other land has almost no plants growing on it at all?

To grow, plants need several things. One is warmth. In very cold places almost nothing grows. Plants also need water. In very dry parts of the Earth only a few unusual plants can grow. That’s why dry deserts everywhere are almost not covered by trees or grass.

Plants must also have a place in which to put down their roots and grow. They find it difficult to grow on hard land. The town is built on hard land. The plants here have only the soil (土壤)found between the cracks of the stones to grow in.

Another thing plants must have before they can grow is food.

What will happen if we try to make things grow on the sandy beach? A few plants, such as beach grass, will grow in sand, but most plants won’t. Even if the weather is warm enough and we water the plants each day. Many of them will die because the sand on this beach has almost no food for plants.

1.According to the passage, plants need _____ things to grow well.

A．two              B．three             C．four              D．five

2.What does the underlined word “cracks” mean in the text?

A．縫隙             B．表面             C．夾層             D．底部

3.From the passage, we can know it is _______ for plants to grow in dry places.

A．easy             B．difficult           C．impossible         D．important

4.The reason why most plants can’t grow on the sandy beach is that _______.

A．there isn’t enough sunlight               B．there is too much water

C．it is too crowded there                   D．it has little food for plants

5.The passage can most probably be found in a ______ book.

A．science           B．history            C．travel            D．math

 

【答案】

1.C

2.A

3.B

4.D

5.A

【解析】

試題分析：這篇短文主要描述了植物正在所需要的四種自然條件。

1.根據(jù)短文描述，可知植生長(zhǎng)需要四種條件，溫度，水分，土壤和養(yǎng)分。故選C。

2.聯(lián)系下文of the stones 石頭之間，可知此處指的是縫隙，故選A。

3.根據(jù)第二段In very dry parts of the Earth only a few unusual plants can grow.描述，可知植物很難在干旱的地方生長(zhǎng)，故選B。

4.根據(jù)最后一段Many of them will die because the sand on this beach has almost no food for plants.描述，可知選D。

5.這篇短文主要介紹了植物生長(zhǎng)所需要的條件，故最可能出自一本科學(xué)類(lèi)書(shū)籍，故選A。

考點(diǎn)：關(guān)于植物生長(zhǎng)條件的說(shuō)明文閱讀

點(diǎn)評(píng)：本文淺顯易懂，層次分明，學(xué)生很容易把握文章中心內(nèi)容。答題中注意帶著問(wèn)題閱讀短文，一般就能順利找出答題依據(jù)。對(duì)于不能直接找到根據(jù)的問(wèn)題注意聯(lián)系上下文，根據(jù)短文中心總結(jié)出正確答案。

 

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