胶丸与滴丸的共同的特点是
A．均为药丸
B．均为滴制法制备
C．均采用明胶膜材料
D．均采用PEC(聚乙二醇)类基质
E．以上说法都不正确
参考答案：C
As it was his first time to visit the science museum, the boy seemed ___about everything there. [ ]
A. anxious
B. curious
C. particular
D. frightened
梁板式肋形楼板中粱的宽为梁高的( )。
A．1/3～1/2
B．1/4～1/3
C．1/2～1/4
D．1/2～2/3
