锅炉连续排污取样水管一般安装在汽包正常水位下()。
A.100~200mm
B.200~300mm
C.300mm以下
D.50~100mm
参考答案:B
No one in the department but Tom and I _____ that the director is going to resign.
A.knows
B.know
C.have known
D.am to know
普米克令舒又称()。
A.普米克雾化混悬液
B.普米克水针剂
C.普米克粉针剂
D.普米克胶囊