三来一补贸易宜采用开立信用证和买方信贷相结合的结算方式。
参考答案：错
金饰品常用K表示其含金量，24K为纯金，18K金饰品的含金量为 ______．
---The vase cost me almost 100 yuan.
---Well, it was crazy of you to spend so much money _____you could buy a much cheaper one.
A．while
B．if
C．because
D．when
