下列哪项是阵发性睡眠性血红蛋白尿特异性的诊断依据()
A.红细胞寿命缩短
B.Coombs试验(+)
C.HbE(+)
D.Ham试验(+)
E.网织红细胞增高
参考答案:D
______ when he was young, he would have a good job now.
A.had he worked
B.did he work
C.if he worked
D.if he has worked
生境调控