问题 填空题

等底等高的圆柱和圆锥,圆柱的体积等于圆锥体积的______倍,圆锥的体积等于圆柱体积的______.所以圆锥的体积计算公式为:______.

答案

根据圆锥体积计算公式的推导过程可知:等底等高的圆柱和圆锥,圆柱的体积等于圆锥体积的3倍,圆锥的体积等于圆柱体积的

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3

所以圆锥的体积计算公式为:圆锥的体积=底面积×高×

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3

故答案为:3,

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,圆锥的体积=底面积×高×
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阅读理解

When you buy a T-shirt, or a fur coat in a store, it often carries a label(标签) telling who made it or from what store it was bought.

Indeed, some labels show the dress is famous and it is very expensive, so buyers secretly wish they might be carried forever. On the other hand, buyers who deal with the cheapest products(产品) would be pleased to do away with labels completely.

However, there is another label more important than the one showing from which store the dress was bought. When a person buys a fur coat, or a jacket, from a store, a label telling what the product is made of should be carried to it.

According to the law, this label must be carried. Besides telling what the product on show is made of, the label should be in clear English and be where one can find it easily. The information on the label must be true.

The reason for this label is that most buyers today don’t know exactly(确切地) what kind of fur or material they are buying. The buyer must believe in the store that sells the products or in what the labels say.

小题1: The law says that furs must carry a __________.

A.clean label

B.clear label

C.white label

D.secret label小题2:This article is mainly about _______.

A.making furs and clothes

B.protecting buyers with law

C.keeping the buyer understood

D.businessmen and sellers小题3: The writer doesn’t agree that ________.

A.labels are not true

B.clothing stores sell cheap dresses

C.all the products have labels.

D.buyers buy the clothes with labels小题4:Which of the following is TRUE?

A.A T-shirt seldom carries a label.

B.A fur coat with a high price often carries a false label.

C.A label only says what material the product is made of.

D.Not all buyers know the material they are buying.

单项选择题