制备植入剂（）.
A．硅橡胶
B．乙酸纤维素
C．单硬脂酸甘油酯
D．无毒聚氯乙烯
E．HPMC
参考答案：A
单项选择。
— ______ five donuts?
— Five yuan. [ ]
A. How many for
B. How much for
C. How much is
D. How tall is
大豆浓缩蛋白质
