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    Hello!I'm Kate．I want to talk about my smart phone(智能手机)．My smart phone is white．It's from my uncle Sam．He works in New York and comes back to London every December．I like mv smart phone．It is useful.
    The school rules don't allow(允许)us to take smart phones to school,so I usually use it after school or on the weekend．When I go out with my friends，I like keeping it in my bag．So my family can call me at any time．When I don't go to school．I like to call my friends to talk to them，or ask them for help with my study．I'm not very good at math，so I put an APP(应用软件)about math in my smart phone to help me． It is fun and helpful．I also use the smart phone to do some reading，play games，and watch movies．Isn't it great?
    Sometimes smart phones are not good for people．Some people spend too much time on it．I like my smart phone and I know how to let it help me. It's my good friend．
根据材料内容选择最佳答案。

My school is ________ the zoo.

“脚印”“笑脸”“五环”等焰火让北京奥运会开幕式更加辉煌壮观，这些五彩缤纷的焰火与元素的焰色反应有关。下列说法错误的是                         （   ）

下列各物质在氧气中燃烧时，能生成黑色固体物质的是   （     ）

如图，Rt△APC的顶点A，P在反比例函数y＝$\frac{1}{x}$的图象上，已知P的坐标为（1，1），tanA=$\frac{1}{n}$（n≥2的自然数）；当n=2，3，4…2010时，A的横坐标相应为a₂，a₃，a₄，…，a₂₀₁₀，则$\frac{1}{a_2}$+$\frac{1}{a_3}$+$\frac{1}{a_4}$+…+$\frac{1}{a_{2010}}$=（　)