如图1所示,空心圆轴受扭,横截面上扭矩为,则该横截面上切应力的分布规律为( )。

A、<img src="https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/examination/imgUplod/14818021504997439546031994ffb8e8ce520ce5e3f09.png" alt="上传图片">

B、<img src="https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/examination/imgUplod/1481802158939b4a99014a406466aa528f73ead89797d.png" alt="上传图片">

C、<img src="https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/examination/imgUplod/1481802167950957778b3f93d46b6aab201504600cba7.png" alt="上传图片">

D、<img src="https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/examination/imgUplod/148180217722605577a4d6363404dbd6ef2845c7a1a49.png" alt="上传图片">