问题
单项选择题
如图3-46所示，雨篷剖面计算简图P=1kN，P对A点和B点的力矩分别为MA、MB，其正确值是哪项（）
A.MA=2kN·m，MB=1kN·m
B.MA=1kN·m，MB=1kN·m
C.
D.MA=0kN·m，MB=1kN·m
答案
参考答案：B
解析：
图3-46所示的结构，MA=P·r=l×1=1kN·MB=P·r=1×1=1kN·m。
搜题请搜索小程序“爱下问搜题”
如图3-46所示，雨篷剖面计算简图P=1kN，P对A点和B点的力矩分别为MA、MB，其正确值是哪项（）
A.MA=2kN·m，MB=1kN·m
B.MA=1kN·m，MB=1kN·m
C.
D.MA=0kN·m，MB=1kN·m
参考答案：B
解析：
图3-46所示的结构，MA=P·r=l×1=1kN·MB=P·r=1×1=1kN·m。
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