I think it is a top priority for the government to furnish the children with ___to the information superhighway.

A．procedure

B．allowance

C．means

D．access

下列哪项不是固定义齿的特点（）

A.胎力由牙周组织承担

B.咀嚼效率高

C.稳固

D.舒适

E.牙合关系好