保持国民经济总量平衡和促进经济结构优化是我国宏观调控的核心。
参考答案：对
He was about to tell me the secret_____ someone patted him on the shoulder.
A．as
B．until
C．while
D．when
默认情况下，语句：Dim student（4，5to6）定义的数组有（）个元素。
A.20
B.24
C.10
D.30
