关于图示结构Ⅰ、Ⅱ的跨中挠度△、△说法正确的是( )。

• A.△<img src="https://timg.fentiku.com/97/2016/12/22/GAGzCO6IAe.png" title='GAGzCO6IAe.png' alt='GAGzCO6IAe.png'/>>△<img src="https://timg.fentiku.com/97/2016/12/22/x7QYtqN1Qm.png" title='x7QYtqN1Qm.png' alt='x7QYtqN1Qm.png'/>
• B.△<img src="https://timg.fentiku.com/97/2016/12/22/GNdx5HAkNu.png" title='GNdx5HAkNu.png' alt='GNdx5HAkNu.png'/><△<img src="https://timg.fentiku.com/97/2016/12/22/v9rk33SzYj.png" title='v9rk33SzYj.png' alt='v9rk33SzYj.png'/>
• C.△<img src="https://timg.fentiku.com/97/2016/12/22/t8mE184a8q.png" title='t8mE184a8q.png' alt='t8mE184a8q.png'/>=△<img src="https://timg.fentiku.com/97/2016/12/22/seDtC9eh1N.png" title='seDtC9eh1N.png' alt='seDtC9eh1N.png'/>
• D.无法判断

正确答案：A