题目内容
下列关于桩核冠的说法，错误的是
2021-12-23
A.桩长度越长，固位力越强
B.固位力取决于摩擦力和粘固面积
C.桩的直径对固位无影响
D.修复前必须行完善的根充
E.可作固定桥的固位体
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