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)
出自:国家开放大学《建筑力学》