乌头反
A．甘遂
B．丹参
C．京大戟
D．黄芪
E．贝母
参考答案：E
The driver tried everything he could think of, but the car just ______ not move.
A．should
B．might
C．must
D．would
利用酪蛋白的酸凝固可生产（）
A.酸稀奶油
B.淡炼乳
C.酸牛乳
