单项选择题

A.初模颈部尺寸为ф35MM,口模颈部尺寸为ф35MM
B.初模颈部尺寸为ф35MM,口模颈部尺寸为ф35.5MM
C.初模颈部尺寸为ф35MM,口模颈部尺寸为ф36MM
D.初模颈部尺寸为ф35.5MM,口模颈部尺寸为ф35MM