承兑
参考答案：
是指汇票付款人承诺在汇票到期日支付汇票金额的票据行为。
把刚买来的鱼放入圆形鱼缸里，从鱼缸外侧看，缸中的鱼比放入前大了许多，这是因为圆形鱼缸相当于一个______，所以看到的是鱼的______像（选填“虚”或“实”）．
—Can you give me some information about Paris?
—Sorry, I ____ to Paris, So I know nothing about it. [ ]
A. don't travel
B. won't travel
C. haven't traveled
D. hadn't traveled
