【名词&注释】
下颌牙列(mandibular dentition)、补偿曲线(the compensating curve)
[单选题]唾液pH约在()
A. 6.0~7.9 B. 5.0~6.9 C. 5.0~7.9 D. 6.0~8.9 E. 6.5~7.5