题型:填空题 有关焦点极限分辨率的叙述,错误的是A.X线管焦点小,分辨率大B.焦点上线量分布为单峰时,分辨率大C.焦点上线量分布为双峰时,分辨率大D.MTF=0时的分辨率为极限分辨率E.MTF=1.0时的信息传递最高 查看答案
题型:填空题 He failed the midterm examination and only then ________how much time he had wasted. A.he realizedB.did he realizeC.he had realizedD.had he realized 查看答案