图示刚架受力偶m作用，正确的弯矩图是<br/> <img src="https://static.zxtiku.com/wangke/imgs/topic/7487fe24424fedd211d8cf14173cd66d.jpg"/><br/> A、<img src="https://static.zxtiku.com/wangke/imgs/topic/02ebe8ff6e12cb1cad12a20b88743185.jpg"/><br/> B、<img src="https://static.zxtiku.com/wangke/imgs/topic/005d0133b0c6a159f3c38da810c86923.jpg"/><br/> C、<img src="https://static.zxtiku.com/wangke/imgs/topic/dcad84698cc2d309d32e60e040e8d7c2.jpg"/><br/> D、<img src="https://static.zxtiku.com/wangke/imgs/topic/1c1ca6659b6433d9e479969f65107a2d.jpg"/>