理想气体经节流后,其比焓将()。
A.降低
B.升高
C.不变
D.不一定
参考答案:C
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