十九大报告指出，防范化解重大风险、精准脱贫、污染防治是新时期的三大攻坚战。严重的雾霾天气会造成高速封路机场停摆，工地停工学校停课，市民们呼吸道疾病的高发……为了治理雾霾，政府要落实***新时代中国特色社会主义思想、增强可持续发展能力；要做好打硬仗打持久战的准备；企事业单位和其他生产经营者应当采取有效措施，防止、减少大气污染；每个公民要从身边的小事做起，增强环境保护意识，倡导全民绿色出行。只有各方各尽其责、协调一致、形成合力，大家才能看到更多的蓝天白云、呼吸更加洁净的空气。

结合材料，运用唯物辩证法的总特征的知识，为治理雾霾提建议。

He devoted most of his time to his research, believing his hard work would___sooner or later.

短文填空
    Two weeks after the conclusion of the hit show Chinese Poetry Competition, a new program, Readers, has become a nationwide stir. ____(broadcast) on CCTV over the weekend, it is arousing fresh ____(enthusiastic) for literature in China.
    The weekly talk show, produced and hosted by famous TV personality Dong Qing, ____(invite) people from all walks of life ____(read) aloud parts of poems, essays and books that they like or wrote. The participants also share stories from their own life explaining ____particular pieces touched their hearts or shaped their lives.
    Five days after____(it) first show on CCTV-1 on Saturday, Readers has been rated 9.2 points out of 10 on Douban, one of China's most popular review sites. Internet ____(use) have praised it as a breath of fresh air among variety shows in China, a refreshing change from the usual dance and singing shows that dominate live television.
    But the success of these programs is just like a vane, through which we can see that there is ____huge demand of cultural show in the public. In today's television world ____reality shows have dominated, this is very____encourage).

有关我国天然气资源的分布和开发格局的说法正确的是（ 　 ）

如图所示，将一把钢尺紧压在桌面上，尺的一端伸出桌面，改变钢尺伸出桌面的长度，用手拨动使其上下振动发出声音．音叉发出的声音（   ）