单项选择题
A.5~15ml:100g B.30~35ml:100g C.18~24ml:100g D.40~45ml:100g E.50~60ml:100g
A.烤瓷核桩冠 B.甲冠 C.烤塑冠 D.烤瓷贴面冠 E.嵌体冠