咬合病的临床表现不包括：（）
A.磨损
B.牙髓炎
C.牙周组织创伤
D.磨牙症
E.TMD
参考答案：B
平面磨床的工件是如何安装在工作台上的
He doesn't think the question of ______ they are boys or girls is important .[ ]
A. if
B. whether
C. which
D. that
