下列可作为肠溶衣膜材的是()
A. HPC
B. HPMC
C. HPMCP
D. CMC—Na
EC
"Jims dog died yesterday" presupposes______.
A. Jim"s dog is dead
B. Jim had a dog
C. Jim"s dog was alive the day before yesterday
D. none of the above
下列各组辅料中,可作为片剂崩解剂的—组是()
A. 淀粉L—HPC CMC—Na
B. 交联PVP CC一Na CMS一Na
C. MC L一HFC CaMS-Na
D. HPMC PVP L-HPC
E. 交联PVP 淀粉 EC
若下列几种气体集中在巷道的话,应在巷道底板附近检测的气体是()。
A. CH4,CO
B. CH4,H2
CO2,SO2
D. CO2、CO