Several rounds of air and ground attacks from the allied force left the whole city _______.

A．in pieces

B．in ruins

C．in part

D．in place

连结下颌中切牙边缘之近中切角与下颌双侧第二磨牙远中颊尖所构成的假想平面为

A．牙合
B．牙合平面
C．横牙合曲线(Wilson曲线)
D．纵牙合曲线(补偿曲线)
E．司比曲线(Spee曲线)