流行病学统计,女性发病多于男性的有
A.白斑
B.盘状红斑狼疮
C.龋病
D.地图舌
E.牙龈癌
参考答案:B
Peter has ____ good friends. But ____ of them can speak English.[ ]
A. few, a few
B. a few, few
C. little, a little
D. a little, little
冲模的压力中心必须与()重合。