具有安胎作用的药物是（）。
A.麝香
B.艾叶
C.砂仁
D.紫苏
E.黄芩
参考答案：B, C, D, E
— _____________?
—She's tall and thin with long hair. She is very beautiful. [ ]
A. What does she do
B. What would she like
C. What does she look like
D. What does she like
一台三相异步电动机，其铭牌上标明额定电压为380/220V，其接法应为______。
A．Y/Δ B．Δ/Y C．Δ/Δ D．Y/Y
