—Is he Li Ping?
—Yes, ______.[ ]
A. I'm
B. he's
C. he is
C
He planned _________ the work before Wednesday but failed.
[ ]
A. to finish
B. finishing
C. finished
影响固定义齿桥体所受力大小的是桥体的（）
A．颊舌向径
B．轴面形态
C．龈面形态
D．自洁形态
E．结构强度
力大小的是桥体的（）