题目内容

8. Only after they had performed hundreds of experiments did they succeed in (solve) ______ the problem.

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9. The local government has decided to spend more money on the (equip) ______ of the hospitals in the rural area.

10. I tried to fix the computer myself, but that just made it (bad) ______ than I had expected.

下列函数中不是聚合函数的是( )。

A. COUNT()
B. MIN()
C. SUM()
D. SQRT()

以哪个符号开头的变量是全局变量( )。

A. @
B. @*
C. @@
D. @$