一底面半径为的圆柱，被一平面所截剩下部分母线最大值为a，最小_爱下问搜题

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问题填空题

一底面半径为的圆柱，被一平面所截剩下部分母线最大值为a，最小值为b，那么圆柱被截后剩下部分的体积为（）。

答案

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Johnny, a lizard (蜥蜴），lived between some rocks in the country, where he liked sunbathing every morning. One day, he felt so       that he didn’t notice some boys coming up behind him. The boys caught Johnny, and he could only escape from their hands by losing his       and running to hide.
The children watched his tail moving about, but they soon threw the tail away and left. Johnny came out to       his tail, but could find no       of it. Feeling so sad, he decided to       doing everything else in his life and spending all his time finding his tail. Days and months passed, and Johnny kept looking, asking everyone       they had seen his tail. However, there was      no news about it.
One day, he asked a boy and the boy       replied, “Why do you need two tails?” After hearing this, Johnny turned back and saw that he had grown a new, stronger tail. He suddenly realised how       it had been to waste so much time on a problem like it. Johnny headed for home.
    , he suddenly found his old tail on the roadside. Although it       terrible, Johnny was still excited to have it back. He picked it up and was about to       his journey. Just at that moment, an idea hit him that he shouldn’t look at the past and worry about it since it was not useful for      .
He then decided to       his old tail there, leaving with it all his past worries. As he continued his journey, all he took with him were thoughts of the present and the dreams of the       .
As we know, it’s not good to look at the past, unless it helps in the future. Let the past go with the wind.

C．surprisedly

D．wonderfully

多项选择题

根据著作权法的规定，下列哪些属于著作权法所保护的作品

A．计算机软件

B．杂技艺术作品

C．工程设计图

D．国家机关的决定