Tina and Vera are sisters. They live in a big city. Tina is not as old____Vera. She is older than her. She thinks living in the city is much____(interesting)than in the countryside. She likes the lights in her city. She thinks the lights in her city are the ____(beautiful) in the world. She enjoys____(read) and she reads____(many)books than Vera.____, Vera dislikes living in the city. She thinks living in the countryside____(be) much better. She often____(visit) her grandparents in the countryside and takes vacations there. She often takes walks____ supper. It makes her____(feel) very relaxed.

围绕“完善我国基本政治制度，发展社会主义民主政治”这一主题，某学生为一次政治讨论课准备了一些材料。下列材料符合该主题是（　　）

①民进中央向国务院提出关于长江上游综合改革的建议

②天津市人大常委会审议《天津市客运公共交通管理条例》

③新疆自治区高级人民法院依法行使自治权，审判暴恐分子

④寿光现代小区居委会邀请居民代表对社区事务提出建议。

不回收的航天器在使用后，将成为太空垃圾．如图所示是飘浮在地球附近的太空垃圾示意图，下列说法中正确的是（    ）

计算：$3\sqrt{\frac{2}{3}}\times \left(-\frac{1}{8}\sqrt{15}\right)÷\frac{1}{2}\sqrt{\frac{2}{5}}$