与连续X射线的最短波长有关的是()
A.管电压
B.管电流
C.照射时间
D.电子电量
E.光子数量
参考答案:A
---He is______ a brave man.
---we can’t admire his courage ______.
A.actually; very much
B.indeed; too a lot
C.really; too much
D.truly; a bit
我国的《职业分析大典》将职业分为细类()个。
A.1388
B.1883
C.1838
D.1383