制备硬胶囊壳,不需要加入的附加剂是()
A.助悬剂
B.增塑剂
C.遮光剂
D.增稠剂
E.防腐剂
参考答案:A
—Would you please carry the heavy bag for me?
— _____. [ ]
A. No problem!
B. What a pity!
C. Not at all.
D. Thank you.
单相交流电路中,电源电压U乘电路电流I即等于该电路消耗的有功率。()