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What is Boxing Day （节礼日）
Boxing Day is on December 26. It is a 1． holiday in the U. K. and Ireland. On this day, people spend time with their family members and friends.
Why is it 2． Boxing Day? First, it has nothing to do with sport of boxing（拳击）. Boxing Day 3．back to the Victorian era（维多利亚时代）. At that time, many churches put a box in front of their gates, and people would have their donations（捐赠物）in the box. What's more, on the day after Christmas Day, domestic servant（家仆）were given time to visit their families because they 4．work on Christmas Day. Each servant would be given a box to take home. There were 5．, money and sometimes food inside the box.
Until 2004, Boxing Day hunts（狩猎）were a 6．part of the special day, but the ban（禁令）on fox hunting has put an end to it. However another "sport" shopping, has appeared in recent years. Boxing Day has now become a day for people to buy things at lower price, which sounds like the Double 11 shopping day in China.
同类型试题
y = sin x， x∈R， y∈[–1，1]，周期为2π，函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x， x∈[–1，1]， y∈[–π/2，π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2
y = sin x， x∈R， y∈[–1，1]，周期为2π，函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x， x∈[–1，1]， y∈[–π/2，π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2
