在平面直角坐标系中，有一条线段AB，已知点A（﹣2，0）和B（0，2），平移线段AB得到线段A₁B₁．若点A的对应点A₁的坐标为（1，3），则线段A₁B₁的中点坐标是____ 

有这样一道数学题：90％×90％×90％×90％×90％=59％。它告诉我们，一项工作做到90％已经很不错了，但经过环环相扣的一系列过程结束后，“很不错”的90分最终带来的结果可能是59分……一个不及格的分数，这就是过程控制效应。它启示我们
①质变是量变的结果，要重视量的积累   ②要抓住时机，实现事物的质变
③要注重系统内部结构的优化趋向       ④要立足整体，发挥整体统率作用

计算$\sqrt[3]{27}$的结果是（　　）

Last night I was getting ready for the coming examination while the noise from my neighbor interrupted me. The noise went on and on. It was too loud that I could hardly pay attention with my study any longer. So I went to my neighbor house and said him, “Excuse me, would you please turn down the TV? I’m preparing for tomorrow’s examination.” Hear these words, his face turned to red. And he said, “OK, I will. I’m very sorry have made so much noise. Just now, the football game was very wonderful. I was too exciting to control myself. I won’t do that again. Good luck in your coming examination.” After that, I got down to his study.

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阅读材料回答问题

小华爸爸早逝，他与妈妈一起生活。妈妈整天忙于工作，无暇顾及他，就给他请了一个保姆，并且给了他很多零花钱。小华认为妈妈不爱他，因为只有在他生病或者惹祸时才能够看见妈妈。于是，小华经常惹是生非，学习成绩也直线下降。

要建立一个幸福和谐的家，小华和妈妈应该怎么做？请你给他们建议。