免疫应答中作用于粘膜上的局部抗体是：（）
A.IgA
B.IgE
C.IgG
D.IgM
参考答案：A
He said he would arrive before seven, and______ ．
A．he did
B．did he
C．he had
D．had he
存款人为临时机构的，只能在其驻地开立一个临时存款账户，不得开立其他银行结算账户。( )
