I _________ Lucy to be careful with her handwriting all the time, but she hasn’t polished it at all.

A．told

B．have been telling

C．will be telling

D．have told

X射线图像识别方法中的形状分析法是通过图像中物体的（）判断物体

A.颜色

B.X射线穿透度

C.灰度

D.轮廓