羚角钩藤汤的臣药是（）。
A.桑叶
B.川贝母
C.鲜生地
D.淡竹茹
E.茯神木
参考答案：A
．From his ________ voice on the phone I know everything is going under way.
A．satisfactory
B．satisfying
C．satisfied
D．satisfaction
轨道必须按标准铺设、扣件齐全，并且（）相符。
A.轨型
B.拉杆
C.螺栓
