下列哪些属于靶向制剂
A．渗透泵
B．毫微颗粒
C．脂质体
D．胃内漂浮制剂
E．微球
参考答案：B,C,E
知识在于积累。下面是小乐同学制作的化学知识卡片的部分内容，请将其补充完整。
It _____ have been Tom that parked the car here, as he is the only one with a car. [ ]
A. may
B. can
C. must
D. should
