7. Working from home is flexible and beneficial not only to the employees but also to the (employ) ______.
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8. Only after they had performed hundreds of experiments did they succeed in (solve) ______ the problem.
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()