题目内容：
假定MED未知，试问，梁EF的梁端弯矩MEF(kN·m)，与下列何项数值最为接近?(A)63.8
(B)24.5
(C)36.0
(D)39.3
参考答案：
答案解析：
单选题：假定MED未知，试问，梁EF的梁端弯矩MEF(kN·m)，与下列何项数值最为接近?(A)63.8(B)24.5(C)36
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(A)63.8
(B)24.5
(C)36.0
(D)39.3
(A)63.8
(B)24.5
(C)36.0
(D)39.3
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某公路上一座计算跨径为40m的预应力混凝土简支箱形桥梁，采用C50混凝土(EC=3.45×104MPa，ftk=2.65MPa)，采用后张法施工。该箱梁的跨中断
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