下列关于膜剂特点的错误表述是
A．含量准确B．仅适用于剂量小的药物C．成膜材料用量较多D．起效快且可控速释药E．配伍变化少
参考答案：C
It's good for us to _______ every day. [ ]
A. do morning exercise
B. do morning exercises
C. doing morning exercise
D. doing morning exercises.
两个数的商是25，如果被除数和除数都扩大8倍，商是______．
