______ to get a ticket for the concert Eason's Life, George has been standing in a queue for 3 hours.

A．Determining

B．To determine

C．Being determined

D．Determined

新生儿从母乳中获得的Ig是（）

A.IgA类抗体

B.IgM类抗体

C.IgG类抗体

D.IgD类抗体

E.IgE类抗体