— _____ not here today?
— Bill is not here. [ ]
A. Who's
B. Whose
C. Who are
D. What's
答案:A
具有行气消积功效的药物是
A.使君子
B.苦楝皮
C.槟榔
D.贯众
E.雷丸
切印装置停电后,应将各电机的()旋钮归零。
A.升速
B.降速
C.调速
D.变频