AB杆变形如图中虚线所示，则 A 端的杆端弯矩为：( )
(图1)" alt="AB杆变形如图中虚线所示，则 A 端的杆端弯矩为：( ) (图1)" src=https://img.haodaxue.net/uploadimg/image/20200527/20200527182255_19154.png alt= />(图1)" style="max-width:100%!important;height:auto;" src="https://img.haodaxue.net/uploadimg/image/20200527/20200527182255_19154.png" alt="AB杆变形如图中虚线所示，则 A 端的杆端弯矩为：( ) (图1)" alt="AB杆变形如图中虚线所示，则 A 端的杆端弯矩为：( ) (图1)" src=https://img.haodaxue.net/uploadimg/image/20200527/20200527182255_19154.png alt= />(图1)" src=https://img.haodaxue.net/uploadimg/image/20200527/20200527182255_19154.png alt= />(图1)" />
A.(图2)" alt="AB杆变形如图中虚线所示，则 A 端的杆端弯矩为：( ) (图2)" src=https://img.haodaxue.net/uploadimg/image/20200527/20200527182255_19154.png alt= />(图2)" style="max-width:100%!important;height:auto;" src="http://img.haodaxue.net/uploadimg/ico/2020/0527/1590574700736648.png" />B.(图3)" alt="AB杆变形如图中虚线所示，则 A 端的杆端弯矩为：( ) (图3)" src=https://img.haodaxue.net/uploadimg/image/20200527/20200527182255_19154.png alt= />(图3)" style="max-width:100%!important;height:auto;" src="http://img.haodaxue.net/uploadimg/ico/2020/0527/1590574756141098.png" />C.(图4)" alt="AB杆变形如图中虚线所示，则 A 端的杆端弯矩为：( ) (图4)" src=https://img.haodaxue.net/uploadimg/image/20200527/20200527182255_19154.png alt= />(图4)" style="max-width:100%!important;height:auto;" src="http://img.haodaxue.net/uploadimg/ico/2020/0527/1590574777685640.png" />D.(图5)" alt="AB杆变形如图中虚线所示，则 A 端的杆端弯矩为：( ) (图5)" src=https://img.haodaxue.net/uploadimg/image/20200527/20200527182255_19154.png alt= />(图5)" style="max-width:100%!important;height:auto;" src="http://img.haodaxue.net/uploadimg/ico/2020/0527/1590574791971803.png" />