问题
X线最短波长与波长的关系为
A:λmean=3．5λmin
B:λmean=3.2λmin
C:λmean=2.8λmin
D:λmean=2.5λminE.λmean=2.2λmin
B:λmean=3.2λmin
C:λmean=2.8λmin
D:λmean=2.5λminE.λmean=2.2λmin
正确答案是：
