For other parents, the financial burden of having a second child may be the prime consideration.Synonyms:
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Unfortunately, there is no simple answer to the question of whether or not to have a second child.Antonyms:
在Ig类别转化中,能诱导IgE产生的主要细胞因子是( )
A. IL-4
B. TNF
C. IL-2
D. IL-1
E. IL-6
IL-2主要由下列哪种细胞产生( )
A. 单核-巨噬细胞
B. T淋巴细胞
C. B淋巴细胞
D. NK细胞
E. 中性粒细胞
能促进红细胞前体细胞增殖分化为成熟红细胞的细胞因子是( )
A. IL-1
B. IL-2
C. IL-4
D. IFN
EPO