永磁直流伺服电动机的工作曲线分为三个区域，其中Ⅱ区为( )。
A．加减速区
B．瞬间工作区
C．连续工作区
D．断续工作区
参考答案：D
九味羌活汤的组成药物中含有
A．白芍药
B．山茱萸
C．生地黄
D．麦门冬
E．枸杞子
The students in our class always exercise a lot. homework, they finished it very quickly. [ ]
A. To
B. As for
C. As
D. Because
