唯一能通过胎盘的免疫球蛋白是
A．IgGB．IgAC．IgMD．IgEE．IgD
参考答案：A
解析：IgG是唯一能通过胎盘的免疫球蛋白。
-- I have learned that your husband’s family has a lot of money.
-- ___________? I have never relied on him.
A．What for
B．What if
C．So what
D．How come
期货交易的付款方式有（）。
A.分期支付
B.现在一次付清
C.未来一次付清
D.用现金支付
E.转账支付
