商品交易过程中由于买方延期付款或卖方预收货款而形成的企业之间的一种直接信用关系是( )
A．银行信用
B．租赁信用
C．借贷信用
D．商业信用
参考答案：D
—Is she a student?
—Yes,______. [ ]
A. she is
B. she isn't
C. it is
D. it isn't
塔顶热气相介质旁通管
