承兑业务
参考答案：
是银行为客户开出的汇票或票据签章承诺，保证到期一定付款的业务。
FTE双网间切换时间约为1秒，而传统的双网结构切换时间为（）到30秒。
_____ you are in a speech contest or you are giving a talk in class, a little preparation will make your presentation organized and dynamic.
A．Either
B．On condition that
C．No matter
D．Whether
