2015年1月9日，中共中央、国务院在北京隆重举行国家科学技术奖励大会，中国科学院院士、中国工程院物理研究院高级顾问       获得2014年度国家最高科学技术奖。（   ）

在直角坐标系xOy中，曲线C₁的参数方程为$\left\{\begin{array}{c}x=\sqrt{7}\cos \alpha \\ y=2+\sqrt{7}\sin \alpha \end{array}\right.$（其中α为参数），曲线C₂：（x﹣1）²+y²=1，以坐标原点O为极点，x轴的正半轴为极轴建立极坐标系．

（Ⅰ）求曲线C₁的普通方程和曲线C₂的极坐标方程；

（Ⅱ）若射线θ=$\frac{\mathrm{\pi }}{6}$（ρ＞0）与曲线C₁，C₂分别交于A，B两点，求|AB|．

    Different people have different kinds of hobbies. Some like reading and drawing. Some like playing sports and some like collecting stamps. I have many good friends. They all have their____hobbies. When they were young, they usually____with doll. Now they grow up, they start to have other hobbies. Some of them go out____a sport like football or skating. Some like collecting____and stamps. Some of the most____hobbies are watching TV plays and listening to music. I used to read books____draw pictures. I could learn many useful things.

    People will spend a lot of____training hobbies. Some of them may be____in playing the piano for many years. While some others may____their interests very often.

    Why do people need hobbies? I think a hobby is something we are____of doing. The main goal（目标） of a hobby is to give us a break from our work or study.