We would appreciate it if customers don't______ to leave their suggestions and expectations for our product.

A．hesitate

B．pretend

C．undertake

D．offer

采取哪种印模不需要进行肌功能修整（）

A.解剖式印模

B.功能式印模

C.牙支持式义齿的印模

D.黏膜支持式义齿的印模

E.混合支持式义齿的印模