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A.+5.4P,-1.8P
B.+6.6P,-1.8P
C.-6.6P,+1.8P
D.-5.4P,+1.8P
B.+6.6P,-1.8P
C.-6.6P,+1.8P
D.-5.4P,+1.8P
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参考解析
解析:根据结构力学知识计算。
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