Kennedy牙列缺损分类法分几类（）
A.2类
B.3类
C.4类
D.5类
E.6类
参考答案：C
—I think it is _____ picture.
—I agree with you. [ ]
A. a quite beautiful
B. very a beautiful
C. quite a beautiful
岩溶发育的基本条件？
