带式输送机机头应配备不少于()只的合格灭火器。
A、4
B、2
C、1
D、3
参考答案:B
下列哪组材料全部为片剂中常用的填充剂()
A.淀粉、糖粉、微晶纤维素
B.淀粉、HPMC、CMS-Na
C.淀粉、糖粉、糊精
D.L-HPC、糖粉、糊精
E.硫酸钙、微晶纤维素、乳糖
A good listener takes part in the conversation,offering ideas and ___ questions to keep the talk flowing.
A.raising
B.understanding
C.copying
D.solving