能补肝肾，强筋骨，安胎的药物是（）。
A.淫羊藿
B.巴戟天
C.益智仁
D.黄芩
E.杜仲
参考答案：E
滚轮导靴的导轨面上加润滑油会导致（）.
A.滚轮更好转动
B.滚轮打滑
C.减少噪音
D.更好工作
In the old days, they_______ in the factory from morning to evening. [ ]
A. were made to work
B. asked to work
C. made to work
D. were asked for work
