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Plants are very important living things....

    Plants are very important living things. Life could not go on if there were no plants. This is because plants can make food from air, water and sunlight. Animals and man cannot make food from air, water and sunlight. Animals and man get their food by eating plants and other animals. Therefore, animals and man need plants in order to live. This is why we find that there are so many plants around us.

If you look carefully at the plants around you, you will find that there are two kinds of plants: flowering plants and non-flowering plants. Flowering plants can make seeds. The seeds are protected by the fruits. Some fruits have one seed, some have two, three or four, and some have many seeds. But a few fruits have no seeds at all. Most non-flowering plants do not grow from seeds. They grow from spores(孢子). Spores are very small. Some spores are so small and light that they can float in the air. We may say that spores are quite the same as seeds. When these spores are all on wet and shady places, they usually grow into new plants.

1.The main idea of the first paragraph is that            .

A.plants are important to life B.plants cannot grow without air

C.there are many plants in the world D.we can't live without water

2.What can we infer from the passage?

A.Of all living things, animals are the most important.

B.Spores are seeds.

C.All fruits of flowering plants have seeds.

D.Without plants, man will die out.

3.This passage may be taken from          .

A.a medicine book B.a novel

C.a science magazine D.an experiment report

 

1.A 2.D 3.C 【解析】 这是一篇说明文。本文主要介绍了植物对动物和人类的重要性,并且重点介绍了开花植物和不开花植物以及它们各自的特点。 1.主旨大意题。根据第一段的Life could not go on if there were no plants.”和“Therefore, animals and man need plants in order to live.可知,第一段说的是植物对生命的的重要性。A. plants are important to life(植物对生命很重要)符合以上说法,故选A项。 2.推理判断题。根据第一段的Animals and man get their food by eating plants and other animals. Therefore, animals and man need plants in order to live.可知,人类和动物的生存离不开植物,也就是说,没有植物,人类和动物就会灭绝。D. Without plants, man will die out.(没有植物,人类会灭绝)符合以上推测,故选D项。 3.推理判断题。根据文章的主要内容,尤其是第一段的Plants are very important living things和第二段的flowering plants and non-flowering plants.可知本文主要介绍了植物对动物和人类的重要性以及开花植物和不开花植物的特点,由此可知本文应选自科学杂志。故选C项。
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