普通X线诊断机不能直接做模似定位机，不正确的理由是（）

A、诊断与治疗体位不相同，所获影像性息不能直接定位和计划 

B、诊断机F段。模拟机F长 

C、诊断影像不适宜治疗前的模拟 

D、诊断机光栅与治疗机准直器结构有差异 

E、诊断机与模拟机都是X线机

His uncle has written some short stories, but he is ______ famous for his plays. [ ]

A. the best

B. more

C. better

D. the most