幼年特发性关节炎的遗传易感基因是()
A.HLA-B27
B.HLA-DR2
C.HLA-DR3
D.HLA-DR4
E.HLA-DR5
参考答案:D
In terms of the provisions of the Civil Code, explain the principal rights and obligations of the two parties to a mandate agreement. (10 marks)
自然界中凡是有生命的物体中碳的哪个同位素不变?()
A、C12
B、C13
C、C14
D、C15