“探究导体的电阻跟哪些因素有关”的实验中，按要求回答下面问题：

（1）解方程组：$\left\{\begin{array}{c}2x+y+z=-1\\ 3y-z=-1\\ 3x+2y+3z=-5\end{array}\right.$．

（2）若a^x=10，a^y=2，求a^2x﹣y的值．

    Danny's father is a firefighter. He works at fire station. He's very brave. He h____ short yellow hair. He is tall and thin. His c____ are orange. He likes putting out the f____. Danny's mother is a t____. She works in a school. Her students like her very much. She has a b____ and two dresses. They are purple.

    They are nice. She likes playing games with her students. She is a good teacher.