找考题网-背景图
单项选择题

A. FQC(左)=FQC(右),MC(左)=MC(右)B. FQC(左)=FQC(右)-F,MC(左)=MC……

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)