题目内容
上颌第一磨牙各根管口的形态是
2022-02-18
A.若近颊根分为颊、舌两根管口时，两根管口较扁
B.近颊根管口较圆
C.近颊根管的舌侧根管口距舌侧根管最近
D.远颊根管口较扁
E.舌侧根管口较窄
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