题目内容

I was ____(please) to have received your letter dated May 20th last week.

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She warned me that I ____(have) an accident if I didn't take more care.

MySQL已声明了变量:declare i int,现在为i赋值10, 正确的语句是()。

A. i=10
B. set 10 into i
C. select i=10
D. select 10 into i

MySQL中用()关键字定义局部变量。

A. define
B. declare
C. varible
D. Static

MySQL中用()表示全局变量。

A. define
B. @
C. @@
D. static