______club do you want to join?    [ ]

A. Where                    

B. Who    

C. When                      

D. What

入口前后径狭窄是指

A．对角径小于11.5cm
B．对角径小于12.5cm
C．对角径小于13.5cm
D．坐骨棘问径小于10cm
E．坐骨棘间径小于11cm