一个圆锥形的稻谷堆，量得它的底面周长为12.56米，高为1.5米，已

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问题解答题

一个圆锥形的稻谷堆，量得它的底面周长为12.56米，高为1.5米，已知每立方米稻谷重750千克，这堆稻谷共重多少千克？

答案

谷堆的体积：

×3.14×（12.56÷3.14÷2）²×1.5，

×3.14×2²×1.5，

=3.14×4×0.5，

=6.28（立方米），

稻谷的重量：

6.28×750=4710（千克）；

答：这堆稻谷共重4710千克．

句型转换

按给出的要求转换下列句子，每空限填一词。

1. I have a pain in my head. (改为同义句)

I have _________ _________.

2.You'd better go home at once. (改为否定句)

You'd _________ _________ go home at one.

3. I used to swim in the river near my home. (改为一般疑问句)

_________ you_________ to swim in the river near your home?

4. The pictures are very beautiful. (改为感叹句)

________ _________ the pictures are!

5. Seth played on the computer last Sunday. (改为过去进行时)

Seth _________ _________ on the computer at 8:00 last Sunday.

判断题

上海松江佘山圣母大教堂，被誉为“东方之冠”和“远东第一大教堂”。( )P130