限制TMJ侧方脱位的主要韧带为（）。
A.髁下颌韧带
B.蝶下颌韧带
C.茎突下颌韧带
D.盘锤韧带
参考答案：A
I'm moving to the countryside because the air there is much fresher than _______ in the city.
A．ones
B．one
C．that
D．those
