中央经济工作会议提出，在适度扩大总需求的同时，要着力加强供给侧结构性改革，在制度上、政策上营造宽松的市场经营和投资环境，提高企业投资信心；降低制度性交易成本，降低企业税费负担，清理各种不合理收费。为此，政府要（　　）

①实施经济调节，健全社会保障体系

②科学调控，营造稳定的经济环境

③加强市场监管，减轻企业负担

④简政放权，弱化政府管理职能。

设$a={\int }_0^{\mathrm{\pi }}\left(\sin x+\cos x\right)dx$，则二项式${\left(a\sqrt{x}-\frac{1}{\sqrt{x}}\right)}^5$的展开式中$x^2$项的系数为（   ）

根据文化部发布的《中国文化消费指数》显示，我国文化消费的潜在规模为4．7万亿元，而实际消费仅为1万亿元，存在超过3万亿元的消费缺口。当前我国文化供给端仍有短板，存在文化精品不足、文化产品“下乡难”等问题，文化产品产能过剩和产品有效供给不足这一突出矛盾严重制约了文化产业的健康快速发展。对此（    ）

①加强文化产业的供给侧改革，实现高效、高质的文化供给

②要充分发挥政府在文化资源配置中的主导作用，提供大量文化产品

③文化企业要大力加强文化产品的供给，满足不同人群的文化需求

④文化产品要把社会效益放在首位，实现社会效益和经济效益相统一

    Once upon a time, there was a very young mouse who had never seen anything of the world. He almost got into trouble the very first time he went out. This is the s____ he told his mother about his adventures.

     “I was walking along very quietly when I saw two strange creatures（生物）. One of them had a very kind look, but the other was the most frightening monster you could i____ 

     “On top of his head and in front of his neck, there were pieces of red meat. The moment he saw me, he o____ his mouth as if he wanted to swallow me. Then he let out a roar that frightened me almost to death.”

     “I wanted to make friends with the pretty creature because it looked s____good and gentle. He had thick and smooth fur and a gentle face. His eyes were bright and shining. As he looked at me, he w____ his fine long tail and smiled.

     “My son,” said the mother mouse, “that gentle creature you saw was the cat. In fact the cat eats us. Under his k____appearance, he was against every one of us. The other was nothing but a cock who wouldn't be h____ to you at all. So you're lucky, my child. ”