图示结构连续梁的刚度为EI，梁的变形形式为：

• A.<img src="https://timg.fentiku.com/97/2016/12/22/9psgSRPeGu.png" title='9psgSRPeGu.png' alt='9psgSRPeGu.png'/>
• B.<img src="https://timg.fentiku.com/97/2016/12/22/dYcMAYIPlO.png" title='dYcMAYIPlO.png' alt='dYcMAYIPlO.png'/>
• C.<img src="https://timg.fentiku.com/97/2016/12/22/n2dBC7ArDu.png" title='n2dBC7ArDu.png' alt='n2dBC7ArDu.png'/>
• D.<img src="https://timg.fentiku.com/97/2016/12/22/FymGLqQ0Dq.png" title='FymGLqQ0Dq.png' alt='FymGLqQ0Dq.png'/>

正确答案：D