诊断温抗体型溶血性贫血最主要的实验室检查是()
A.Ham试验
B.蛇毒因子溶血试验
C.Coombs试验
D.Danath-L,andsteiner试验
E.血红蛋白电泳
参考答案:C
专利权人应当自被授予专利权的次年开始缴纳年费。 ( )
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