题目：
下列叶根形式中承受载荷最小的是（）。
A.t型叶根；
B.外包凸肩t型叶根；
C.叉型叶根；
D.枞树型叶根。
答案：
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下列叶根形式中承受载荷最小的是（）。A.t型叶根； B.外包凸肩t型叶根； C.叉型
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