八大行星绕日公转运动具有（）
A.同向性、异面性、近圆性
B.同向性、共面性、近圆性
C.同向性、共面性、同圆性
D.异向性、共面性、近圆性
参考答案：B
_____ on the subject for half an hour, Liu Ying suddenly stopped. [ ]
A. To be worked
B. To work
C. Having worked
D. Having been worked
固经丸的主治病证是（）
A.遗尿
B.遗精
C.崩漏
D.恶露不行
E.带下
