题干

小强是浠水一中高一新生,小强在复习第二章化学物质及其变化后做的笔记,他写道:①物质按照组成可以分为单质和化合物,②单质又可分为金属和非金属,③化合物主要包括:酸、碱、盐和氧化物,④按照分散剂粒子直径大小可将分散系分为溶液、浊液和胶体,⑤只要在水溶液中能导电的化合物就是电解质,⑥按照树状分类法可将化学反应分为:氧化还原反应和离子反应,⑦氧化还原反应的本质是化合价升降.你认为他的笔记中有几处错误(   )

A:三处

B:四处

C:五处

D:六处

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答案(点此获取答案解析)

C

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Living places

The home of the elephant is in the deep forest. It is the largest of all land animals, and is found both in Asia and Africa. One of the main places in Asia where the elephant lives is the island of Ceylon. The huge forests on the island become the home of thousands of elephants. The trees grow thick and tall. They make many parts almost dark, while bright sunlight is above and around them.

Living habits

The elephant likes the deep part and the coolest places of the forest. There he will stand swinging his ears, to drive away the flies; or he will pull down a branch (树枝) from a tree to fan himself. He likes bathing, and to be near a lake or running water. There he takes in the water with his trunk, and spreads it all over his body.

Food

The elephant enjoys the fruits in the forest, and also the leaves of the trees. There is plenty of food for him in the forests, though he is not always happy with what he finds there.

Way of movement

When a group of elephants moves about in the forest, the oldest goes first. The young elephants and their mothers are in the middle, where they are safest. Then all move along with a great noise, the branches of the trees bending and breaking before them. Though the elephant is usually harmless, no one dares to attack (袭击) a group of them moving through the forest.

How people treat them

In Asia the elephant is trained to work. At one time the African elephant also was trained. Soldiers in ancient times often went to fight on the backs of African elephants. But now the elephant that lives in Africa is illegally (非法地) hunted mainly for its valuable ivory. In order to protect them, governments around the world have developed laws to stop this.