---- What an interesting film it is! I really enjoyed it!

----________. I really fell asleep.

A．Yes, you are right

B．No, I don’t think so

C．So it is

D．No, you’re wrong

患者男，56岁，76|67双侧游离缺失，拟行可摘局部义齿修复，54|45做基牙

如果牙槽嵴吸收较重，则末端基牙应该采用哪一种卡环（）。

A.三臂卡环

B.RPI卡环

C.联合卡环

D.间隙卡环

E.对半卡环