单项选择题
A.双侧同时咀嚼 B.双侧交替咀嚼 C.右侧咀嚼 D.左侧咀嚼 E.后牙咀嚼
A.3mm B.5mm C.7mm D.9mm E.10mm
A.20~30mm B.30~40mm C.40~60mm D.50~60mm E.以上都不对
A.30mm B.30~39mm C.40mm D.>40mm E.>50mm
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