语法填空

    ____ (locate) in a mountainous region of Chengde city, the Jinshanling Great Wall section is the ____ (good) preserved part of the Great Wall from the Ming Dynasty with many ____ (origin) features.

    Three towers are must-sees at the Jinshanling Great Wall. Each tower contains ____ own legend. The General Tower was named to commemorate Wu Guihua, a heroine who sacrificed herself to resist invasions ____ the north. The Black Tower and the Taochun Tower were named to commemorate two girls, Heigu and Taochun, ____ made great contributions to the construction of the Great Wall.

    If you go, you will find yourself experiencing ____ (total) different scenery in four seasons. In spring, apricot flowers decorate the Great Wall. In summer, the winding dragon-shaped Great Wall ____ (surround) by a sea of green plants. In autumn, the Great Wall turns into a colorful place and in winter, heavy snow covers the Great Wall, ____ (add) a sense of magnificence and solemnity.

    The annual Apricot Flower Festival kicks off at the beginning of April. If you have time, you should witness the true ____ (beautiful) of the China's landmark.

根据中文和英文提示词写出意思连贯、符合逻辑的短文。所给英文提示词需全都用上，词数在60—80之间。

假如你叫刘辉，是仁爱国际学校的学生。美食节过后，你和同学们积极清理现场，捡废纸，拾塑料瓶，再卖到回收中心，然后给贫困地区儿童捐款。

提示词语：废纸 waste paper；塑料瓶 plastic bottle；回收中心 a recycling center；捐钱 donate the money；贫困地区 poor areas

①能实现社会主义的自我完善和发展

②使中国特色社会主义充满生机和活力

③调整生产力与生产关系不相适应的部分

④从根本上改变我国的经济制度

已知正数x,y满足$\left\{\begin{array}{c}2x-y\le 0\\ x-3y+5\ge 0\end{array}\right.$，则$z=4^{-x}·{\left(\frac{1}{2}\right)}^y$的最小值为(    )