单项选择题 ()是指交易双方在约定的一段时间内，根据双方签订的合同，在一笔象征性本金数额的基础上互相交换具有不同性质的利率款项的支付

单项选择题 预期的购买者为某一商品或服务报出最终价格，代理则为其寻求相应卖家的代理模式被称为()

单项选择题 回答下列各题： A．How about it B．She didn know C．get the money for you D．we didnt haye it E．its a size 40 F．its wrong color G．get a right one for you H．What’s the matter with it John：Hi，Miss，call I return this shia? Saleswoman： 56__________ 41? John：It’s the wrong size．I wear size 42．but ____57___． Saleswoman：I remember nOW．Your wife bought it yesterday． Shewanted size 41．but___58___ ．She then took the smaller size． John： ___59___ that I now wear size 42． Saleswoman：We don’t have a size 42，either．Ok,Ill____60____． __________