金瓷冠修复进行牙体预备时候，前牙切缘应至少磨除
A．1mmB．1.5mmC．2mmD．2.5mmE．3mm
参考答案：C
Mary is a(n) _______ customer, so the waiter knows her likes and dislikes.
A．usual
B．ordinary
C．common
D．regular
电视艺术美的造型性？
