分類說明:植物-Plants

閱讀 : 次

植物

【內(nèi)容提示】

根據(jù)下面內(nèi)容要點寫一篇有關(guān)植物分類的文章：

①植物是非常重要的生物；沒有植物，生命就無法維持。動物和人的食物來源于植物和其他動物。

②植物可以利用空氣、水和陽光制造養(yǎng)料，而人和動物則不能。

③植物的種類繁多，但主要可分為兩大類，即開花植物（flowering plants）和不開花植物（nonflowering plants）。

④開花植物有根、莖、葉、花和果。我們周圍所有的樹木大都是開花植物。

⑤不開花植物在我們周圍見不到多少，它們是些針葉樹、苔蘚、歐龍牙草之類。

⑥多數(shù)植物不是由種子而是由孢子長出來的。孢子和種子非常相似，落到潮濕背陰處就長成新的植物。

以下詞語供參考：

1．coniferous a．針葉樹的 2．moss n．苔蘚；地衣3．liver-wort n．歐龍牙草 4．a(chǎn)lgae n．水藻；海藻 5．fungi n．真菌 6．spore n．孢子

【作文示范】

Plants

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 do so. Animals get their food by eating plants and other animals. Man gets his food by eating plants and animals, too. Therefore, animals and man need plants in order to live.

If you look carefully at the plants around you, you will find that there are many types of plants. Some plants are large while others are small. Most plants are green.

There are two main types of plants: flowering plants and nonflowering plants.

Flowering plants have roots, stems①, leaves, flowers and fruits. Almost all the trees around us are flowering plants. You can probably recognize some plants from their flowers or their fruits.

Nonflowering plants include coniferous trees, mosses, liver-worts, algae and fungi. You cannot see many nonflowering plants around you.

Most plants do not grow from seeds. They grow from spores. Spores are very, very small. Some spores are so small and light that they can float in the air. We may say that spores are quite similar to seeds. When these spores fall on wet and shady② places, they usually grow into new plants.

【詞語解釋】

①stem [stem] n．莖；（樹）干；（葉）梗

②shady[＇sheidi] a．背陰的；陰涼的

【寫法指要】

本文是一篇分類分析說明文。第一段寫植物對人和動物的重要性，我們可以把它看做引言段。第二、三、四段是分類說明：第二段說植物種類繁多、大小不一，但總的可以分為兩種，即開花植物和不開花植物；第三段具體說明開花植物的情況；第四段說明不開花植物的情況。第五段以植物是如何繁殖的作為全文的結(jié)束段。