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单项选择题 简支梁受力如图示,则下述正确的是()

A、 FQC(左)=FQC(右),MC(左)=MC(右)

B、 FQC(左)=FQC(右)-F,MC(左)=MC(右)

C、 FQC(左)=FQC(右)+F,MC(左)=MC(右)

D、 FQC(左)=FQC(右)-F,MC(左)≠MC(右)

  • B
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