异步电动机的转速总是旋转磁场的转速。（）
A.大于
B.等于
C.小于
参考答案：C
( )是职业道德的最高境界。
A．爱岗敬业
B．诚实守信
C．办事公道
D．奉献社会
According to the crowding-out model, persistent, large government budget deficits are most likely to be associated with a(n);（）
A. increase in net exports.
B. decrease in private spending.
C. decrease in the real rate of interest.
