可用于制备固体分散体的辅料是（）
A.聚乙二醇
B.明胶
C.β-环糊精
D.卵磷脂
E.PVA
参考答案：A
某患者因子宫肌瘤行全子宫切除术，此患者术后症状中，不正常的是（）。
A.恶心
B.呕吐
C.腹胀
D.高热
E.伤口疼痛
The TV play _ for ten minutes when I turned on the TV. [ ]
A. had begun
B. has begun
C. has been on
D. had been on
