78÷18=7（个）；
答：需要7个小袋子．
.He said that he____________ to Canada a few years ago.
A. had been to B. have been to C. went
债券质押式回购交易实质是一种以债券为( )拆借资金的信用行为。
A．抵押品B．标的物C．担保品D．衍生品
