皮皮学，免费搜题
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搜题
【判断题】
落叶树于深秋或早夏落叶是对植物本身有利的一种正常生物学现象A.
正确
B.
错误
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】— Where is Ben? — He _____ to the teachers’ office. He will be back soon.
A.
go
B.
has gone
C.
has been
【单选题】―What happened to the old mail carrier? ―He _______ to a new neighborhood to work.
A.
has sent
B.
has been sent
C.
was sent
D.
sent
【单选题】What is the meaning of the man?
A.
He would like to eat at a Chinese restaurant.
B.
He has been to a Chinese restaurant.
C.
He doesn't like to eat at a Chinese restaurant.
【简答题】某化工厂为进一步处理污水，计划新建一个圆柱形污水处理池。水池底面半径是20米，池深5米。 （1）这个污水处理池占地多少平方米？ （2）要在水池的侧面和底部抹水泥，抹水泥部分的面积是多少平方米？ （3）这个水池最多能蓄水多少立方米？
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