前牙金瓷修复体中，唇面瓷层厚度不少于（）
A.0.5mm
B.1mm
C.2mm
D.2.5mm
E.3mm
参考答案：B
Pointing to the house on ____ roof grew lots of bush, the old man told me that was where I would stay.
A．its
B．whose
C．where
D．which
学习策略一定要适于具体的学习目标和学生类型，这是( )
A．特定性原则
B．主体性原则
C．生成性原则
D．内化性原则
