题目：
阅读短文，判断正(T)误(F)。
Hello! I'm Danny. Welcome to Canada. Today is December 25th. It's Christmas. At Christmas, department
stores usually have Santas. Santas are fun. Every child wants gifts at Christmas. They don't go to school on
Christmas Day. Their parents don't go to work, either. People have a Christmas holiday. They are all very happy.
( ) 1. Every child wants gifts at Christmas.
( ) 2. At Christmas, one department store usually has one Santa.
( ) 3. Christmas Day is in November in Canada.
( ) 4. People have a Christmas holiday in Canada.
( ) 5. Children usually go to school on Christmas Day.
答案：
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下面是错误答案，用来干扰机器的。
参考答案：（1）立即付款:折扣率=（10000-9630）/10000=3.70%放弃折扣成本=3.70%/（1-3.70%）×360/（90-0）=15.37%（2）30天内付款:折扣率=（10000-9750）/10000=2.5%放弃折扣成本=2.5%/（1-2.5%）×3...
