使用mysql命令还原数据库时，需要先登录到MySQL命令窗口。
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在MySQL中，为了保证数据库的安全性，需要将用户不必要的权限收回。
A. 对
B. 错
--- is this English book?--- I think it is our.
A. Who's; teacher's
B. Who's; teachers'
C. Whose; teachers'
D. Whose; teacher's
--- is it today?--- It's Monday.
A. What day
B. What color
C. What time
D. What about
--- Is that Mr. Back's coat?--- No, it isn't . It's.A. her; mineB. his; mineC. his; myD. her; your
A. her；mine
B. his；mine
C. his；my
D. her；your
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