阅读下面的文字，完成小题。

瑞鹧鸪

(南宋) 张元幹

白衣苍狗变浮云，千古功名一聚尘。

好是悲歌将进酒，不妨同赋惜余春。

风光全似中原日，臭味要须我辈人。

雨后飞花知底数？醉来赢取自由身。

【注】胡铨（字邦衡）贬到新州以后，继续写了一些慨叹国事的词作。这些词作通过彭德器传到了张元幹手中。他读后感慨万千，情不自禁地写下这首和韵词。

A new owner wanted

    What's your favorite animal? Do you like ____? Bo is my favorite friend, but now I'm____ with my study. I have a hard ____taking good care of him. Can you do that____ of me? If you say “ yes”, please call me at 87549324 or you can ____ your email to Betty @163.com.

    Write to me soon.

    Betty

如图，四棱锥V﹣ABCD中，∠BCD=∠BAD=90°，又∠BCV=∠BAV=90°，求证：VD⊥AC．

已知实数x，y满足$\left\{\begin{array}{c}x-4y\le -3\\ 3x+5y\le 25\\ x\ge 1\end{array}\right.$，求z=2x+y的最大值和最小值．