生活中的下列物质与水混合，一定不能形成溶液的是 [ ]
A．食盐
B．蔗糖
C．酒精
D．植物油
答案：D
The whole class greatly moved at his words. [ ]
A. is
B. are
C. was
D. were
拔牙使用牙挺时一般是将支点放在（）
A.远中牙槽嵴
B.舌侧骨板
C.颊侧骨板
D.近中牙槽嵴
E.邻牙牙颈部
