党的十八届四中全会通过的《中共中央关于全面推进依法治国若干重大问题的决定》。《决定》提出立法机关要“拓宽公民有序参与立法途径，健全法律法规规章草案公开征求意见和公众意见采纳情况反馈机制，广泛凝聚社会共识”。健全立法机关和社会公众沟通机制的作用在于（   ）。

①明确立法权力边界，防止部门利益法律化

②完善立法机制，保障公民政治权利的实现

③使法律更好地体现民意，提高法律权威

④促进公民提高法律意识，自觉遵法守法

阅读下列短文, 在每小题所给的A、B、C、D四个选项中选出最佳选项。

    Men have always wanted to fly like birds. Birds can fly easily because they are light, but men's bodies are heavier.

    Men first went up into the air in balloons. These were big bags, and they were filled with gas. Hydrogen (氢气) is a useful gas for balloons. It is lighter than air. Helium is also lighter than air, but it costs a lot of money. So balloons are usually filled with hydrogen.

Balloons have to fly with the wind as they have no engines (发动机) to drive them. Later, men made airships. They are balloons with engines. They are also filled with hydrogen.

    Aircrafts (飞机) with wings now take people across the world. Powerful engines drive these machines across the sky. Some of the engines are like the engines of cars, but they are more powerful.

    There is another kind of engine, we call it the jet (喷射) engine. An English engineer invented the jet engine. At the same time, Germans were also building a jet engine. In May 1941, the English engineer's new engine was fixed in an aircraft, and the aircraft flew quite well.

    Jet engines are very powerful. Usually two to four are enough for an airplane, but some big aircraft need six. Anyone in a moving jet plane can feel the power of the engines. Jet planes can travel faster than sound. As a flying jet plane leaves its noise behind, we do not hear it until it has gone.

参与全面建成小康社会建设

材料一：在2015年9月的夏季达沃斯论坛上，***在回答南非企业家问题时说：“中国还有一亿多人口居住在棚户区，我们必须给他们一个符合现代标准的居住条件。”

材料二：为优化开发区域发展提供示范和样板，探索生态文明建设有效路径、促进人口经济资源环境相协调，***就推进京津冀协同发展提出要求：要着力加大对协同发展的推动，自觉打破自家“一亩三分地”的思维定式，抱成团朝着顶层设计的目标一起做，充分发挥环渤海地区经济合作发展协调机制的作用；要着力扩大环境容量生态空间，加强生态环境保护合作，在已经启动大气污染防治协作机制的基础上，完善防护林建设、水资源保护、水环境治理、清洁能源使用等领域合作机制。

材料三：法官说，全面小康就是办案不托人情；农民工说，全面小康就是干不动了，能回家养老；小朋友说，我要天天看见蓝天和白云。