问题 解答题

如果圆锥与圆柱的底面积相等,那么圆锥的体积小于圆柱的体积.______.

答案

根据圆柱与圆锥的体积公式可知,圆柱与圆锥的体积不仅与底面积有关,还与它们的高有关,

底面积相等时:

圆锥的高若小于圆柱的高的3倍,则圆锥的体积小于圆柱的体积;

圆锥的高等于圆柱的高的3倍时,圆锥与圆柱的体积相等;

圆锥的高大于圆柱的高的3倍时,圆锥的体积大于圆柱的体积,

所以原题说法错误.

故答案为:错误.

阅读理解

阅读短文,回答问题。

                                                         Mrs Fang’s Day

     At 7: 40 when Mrs Fang is at breakfast, there comes a call. Twenty minutes later, she is with Ann,

because she cannot stop her baby from crying. There, Mrs Fang helps wash Ann’s three-day-old

baby and it calms (安静)down. It is her first child and she is learning what to do. After that, Mrs

Fang goes on to see Mr Johnson, a rich old man who lives alone. His arm was broken and cannot

wash or put on his clothes himself. He must be looked after every day.

     Then Mrs Fang gets her second call that day. She goes to the home for the old. There she works

with the old people till 2: 00 p. m. One by one, she answers their questions and helps them take

their medicine, while the doctor takes care of other more serious problems.

     Mrs Fang keeps hurrying around all day and sometimes she can be rung up even late at night

when the sick must be helped. She is busy, but she likes her job and enjoys helping others. 

1. Who does Mrs Fang get her first call from?

    _________________________________________

2. What does Mrs Fang help Ann do?          

    _________________________________________

3. Why does Mrs Fang look after Mr Johnson?  

    _________________________________________

4. What does Mrs Fang do for the old people?  

    _________________________________________

5. Why does Mrs Fang like her job?            

    _________________________________________                                              

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