下列哪项不是牙合支托的作用（）
A．支持作用
B．传递牙合力
C．直接固位作用
D．恢复抬关系和防止食物嵌塞
E．间接固位作用
参考答案：C
It has been announced by our provincial government that another two medical teams will be sent to _______ the injured people in the severe earthquake.
A．join to
B．join in
C．take part in
D．attend
乙醇作为片剂的润湿剂一般浓度为
A．30%～70%
B．1%～10%
C．10%～20%
D．75%～95%
E．100%
