将x=$\frac{2}{3}$代入反比例函数y=﹣$\frac{1}{x}$中，所得函数值记为y₁，又将x=y₁+1代入函数中，所得函数值记为y₂，再将x=y₂+1代入函数中，所得函数值记为y₃…如此继续下去，求y₂₀₁₄的值．

该小组发现 $f\left(t\right)$ 随时间 $t$ （分钟）的变化规律（ $f\left(t\right)$ 越大，表明学生的注意力越集中）如下： $f\left(t\right)=\{\begin{array}{c}100a^{\frac{t}{10}}-60\left(0\le t\le 10\right)\\ 340(10<t\le 20)\\ -15t+640(20<t\le 40)\end{array}$ （ $a>0$ 且 $a\ne 1$ ）．

若上课后第 $5$ 分钟时的注意力指标为 $140$ ，回答下列问题：

我能将下面的词语工整地抄在田字格里，并且牢牢地记住它们。

网络         屏幕            迫不及待

    China has made big progress in running competitions! The young1Su Bingtian made history on Sunday by becoming the2Asian athlete to appear in the men's 100m final at the world athletics championships.

    As the3man in China, Su was born in a4family in Guangdong in 1989. His parents were both farmers and had a lot of work to do on the farm every day. So Su often helped them with housework at home. Though his study was not very good, he was5at running than many other boys in his class. He6this kind of sport very much, so he practised running as often as possible. In 2004, Su started to take part in different competitions and has won many prizes since then. And this year, he managed to finish 100 metres in 9.99 7. That was the best result in Asia. His dream8! When he heard the news, he could not believe9ears.

    Though Su is famous now, he never behaves arrogantly. Instead, he still works hard10he wants to have a better chance of winning! I believe there is a lesson there.