根据材料内容，选择正确答案。
There are 50 students in Class 8. Now they are doing a survey about how they spend their pocket money. Some spend it on books, and others spend it on visiting. What about you? Please read the form and answer the questions.
10%
55%
12%
13%
Buy some CDs and computer games.
Buy some snacks and drinks.
Buy some books in the bookshop.
Save it up and spend it traveling on holiday.
Buy some gifts for friends.
下列地区中，降水量最丰富的是（ ）
下列城市中，不属于“长江沿江汽车工业走廊”的是（ ）
是
上的偶函数，若对于
，都有
，且当
时，
，则
的值为（ 
▲ ）