正中咬合时，上颌第一磨牙的近中颊尖咬于下颌第一磨牙与下颌第。二磨牙之间，称为()

A、近中错[img=~\/QImg\/Tiles\/YZ51_670_17.gif]
B、远中错[img=~\/QImg\/Tiles\/YZ51_670_17.gif]
C、锁[img=~\/QImg\/Tiles\/YZ51_670_17.gif]
D、正中[img=~\/QImg\/Tiles\/YZ51_670_17.gif]位
E、深覆[img=~\/QImg\/Tiles\/YZ51_670_17.gif]