血友病A是下列哪种因子缺乏()
A.Ⅷ
B.Ⅶ
C.Ⅳ
D.Ⅸ
E.VWF
参考答案:A
解析:血友病A(血友病甲),即因子Ⅷ促凝成分缺乏症,也称AGH缺乏症。
_____, he makes little progress. So he is trying new methods of study. Which of the following is WRONG? [ ]
A. Hard as he works
B. Hard although he works
C. Hard though he works
D. Although he works hard
对于发送端波长转换器的输出光源需要进行的测试项目有()。
A、发送光功率
B、中心波长
C、SMSR
D、插损