--- It’s autumn in Beijing now. Most of the leaves have fallen down.

--- Yes. Only a few leaves _______ on the trees.

A．catch

B．remain

C．change

D．leave

尾骨前后位摄片时，中心线的正确投射是（）

A.垂直投射

B.向头侧倾斜15°

C.向足侧倾斜15°

D.向头侧倾斜45°

E.向足侧倾斜45°