间隙感染脓肿形成后，下列间隙均可作下颌下缘下切口，除了（）。
A.下颌下间隙
B.眶下间隙
C.翼下颌间隙
D.口底蜂窝织炎
E.咬肌间隙
参考答案：B
You can say "He went there _____, not _____."
A．on the car; by car
B．on foot; in his car
C．by foot; by car
D．in his car; by his foot
计算题：欲配制（2+3）乙酸溶液1L，如何配制？
