宏观调控按市场的平衡关系可划分为（）。
A.总量调控
B.结构调控
C.供给调控
D.统一调控
E.需求调控
参考答案：C, E
—Did you have a______time______ in the park?
—Yes. I enjoyed myself very much. [ ]
A. good; playing
B. nice; walk
C. pleasant; to walk
D. pleased; playing
( )不是调节异步电动机转速的参数。
A．变极调速
B．开环调速
C．转差率调速
D．变频调速
