云南省普洱市思茅区云仙乡大芦山彝族青菜节、思茅港镇傣族泼水节、倚象镇云盘山苗族花山节等民族节日各具特色，庆祝这些民族节日(　　)

①可以集中展示民族文化

②能够集中表达民族情感

③是书写中华民族文化的基本载体

④是展示民族文化成就的标志

选词填空。

toys，  catch，   on，   fun，   with

下列函数：xy=1，y= $\frac{x}{3}$ ，y= $\frac{k}{x}$ ，y= $\frac{1}{x-2}$ ，y=2x²中，是y关于x的反比例函数的有（   ）个．

上海外滩海关大钟钟面的直径是5.8米，钟面的面积是多少平方米？时针长2.7米，时针绕一圈时针尖端走过路径的长度是多少米？(得数保留一位小数，π取3.14)

阅读上面短文，然后判断句子正( A )误( B)。
     A man saw a boy standing beside a lake with a mirror (镜子).“Excuse me,” he said, “but could you tell me what you're doing?”
   “I'm fishing.”
   “With a mirror? Could you tell me how it works?”the man asked.
   “OK, but I want five dollars.”
     The man wanted to know the secret very much, so he handed the boy the money.“Now show me how it works,” he said. “Well”, the boy began, “you hold (拿) the mirror towards the water, and when a fish goes by, the sunlight in the mirror gives him a surprise. He stops and doesn't know what to do, and then you catch him at once. ”The man was surprised, “Can you really catch fish with the mirror? How many did you catch?”
   “You're the fifth today!” replied the boy.