预过滤器的附件组成为压差计、放气口、排污口等。()
参考答案:对
--Tom, do you know there _________ a sports meeting next Thursday?
--Sorry, I forgot to tell you.
A.are going be
B.is going to have
C.will have
D.will be
《处方药与非处方药分类管理办法(试行)》将非处方药分为甲乙两类,是根据药品的()
A.方便性
B.稳定性
C.普及性
D.经济性
E.安全性