制备姜半夏的辅料是()
A.生姜、白矾
B.生姜、石灰
C.米醋
D.甘草、黑豆
E.黄酒
参考答案:A
There are many ways in which you can improve your study. But __________, you should work hard.
A.after all
B.above all
C.for all
D.in all
液体渗透检漏探伤常采用()作渗透剂。
A.汽油
B.轻柴油
C.透千油
D.煤油