1920年，有人在一个狼群中发现了两个女童，立即把她们送到当地的孤儿院，她们怕水、火和光，白天躲藏，夜间活动，每晚都像狼一颈长嚎，吃肉时不用手而是用牙齿撕开吃，对他人不感兴趣、没有感情。“狼孩”现象佐证了（    ）

①人的感情交流方式取决于其有目的意识活动

②人的社会实践活动决定其生活方式和精神文化生活

③人的先天条件和后天的生活能力都是能改变的

④人在社会活动中彰显和发挥自己的智力、体力和情感

    Long, long ago, there was a man. He lived in a village. One day, he went to a market and did some shopping. He suddenly found two boxes. Both the two boxes were very beautiful and the man loved them. So he bought the two boxes and took them home.

    He looked at the boxes. He didn't know how to use the boxes. He thought it over and decided to do something special. He decided to put all of his happiness in the yellow box and all of his sadness in the black box. He thought that it was funny to do that.

    A few days later, the yellow box was very heavy, but the black box was still light.

    He didn't know why. He decided to open the two boxes and found out the truth. He opened the yellow box and found nothing. Then he opened the black box and saw a hole (洞)at the bottom(底).

植物体由小长大的基础和原因是（　　）

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=（　　）$\frac{1}{a^2}+\frac{1}{a^3}+\frac{1}{a^4}+···+\frac{1}{a2010}=$

若$y=x^{2-m}$是反比例函数，则m=（   ）