13×99

定义：$F\left(x,y\right)=y^x\left(x>0,y>0\right)$，已知数列$\left\{a_n\right\}$满足$a_n=\frac{F\left(n,2\right)}{F\left(2,n\right)}$$\left(n\in N^{*}\right)$，若对任意正整数n，都有$a_n\ge a_k\left(k\in N^{*}\right)$成立，则a_k的值为  ( )      

    One day Eddie and Hobo looked at the ____. Eddie thought he saw a____but Hobo thought it was a ____. Because Hobo saw one ____. Eddie thought there were many bright ____and it was too____, so it couldn't be a plane.

—No, you ____(not).