问答题

创建用户demo，给该用户授权，让它可以有数据库demo的完全访问权限，简述步骤。

答案： 1.先用root身份登录；2.执行命令：create user 'demo'@'localhost' identifie...

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多项选择题

内碎屑根据其颗粒直径大小可以划分为哪些级别？

A．砾屑
B．砂屑
C．粉屑
D．泥屑

单项选择题

Which one is the correct answer?
A.
He leaves for school at 8. B.
He is studying in Paris.
C.
He is doing very well.
D.
He likes his school.