应用标识符AI（00）指示其后的数据域为（）
A.GTIN
B.SSCC
C.GLN
D.GSRN
参考答案：B
—Can you help me carry the box?
—_____.[ ]
A. Here you are
B. That's all right
C. Certainly, let me help you
D. I don't do
体液补体抑制因子是( )
A．C1qB．IgG1C．IL-2D．H因子E．B因子
