When I was young，my father told me that little acts of kindness may give one great happiness. Since then I have always tried to help people in1.
One hot summer afternoon, I was2down the highway to New York when another car suddenly3into my lane(车道). My car was in the far right lane，so it ran onto the roadside. As a(n) 4driver，I moved my car quickly and skillfully back onto the highway without causing any accident.
I was5with that driver，but I thought that he just did not pay attention to the lane change, and he 6did not do that on purpose(故意).The car ran away7after cutting me off. Very soon it disappeared from sight. After a while，I came around a curve(弯道) and found the8car. The driver was walking along the roadside. He was an elderly man and looked9. With no telephone nearby and the nearest services twenty miles away. I decided to 10and see what the problem was.
The man’s car had a flat tire(瘪胎). Although he had a spare tire，he had nothing to work with. I decided to11him. I changed the tire for him and allowed him to sit in my Air-conditioned car while I did it. Fifteen minutes later，I12the work. I was hot and tired，but I really felt13after an act of kindness to the man who had earlier14my car ran off the road.
You can really enjoy great15from kindness acts, so always lend your hands to others in trouble.

2015年1月15日，全国环境保护工作会议在北京召开。会议的主要任务是，贯彻落实十八届三中、四中全会以及中央经济工作会议精神，深入贯彻******系列重要讲话精神和***、张高丽副总理重要批示精神，总结2014年工作进展，研究部署2015年重点任务。环境保护部部长周生贤出席会议并讲话，强调要着力抓好生态环境保护领域改革，积极探索环境保护新路，大力推进生态文明建设，为建设美丽中国做出更大贡献。

今年年初，柴静的一部《穹顶之下——雾霾调查》新闻调查引起了人们的热议，引发了人们再次对环境问题的关注。面对生态保护和发展经济的两难困局，某市宣传部门以详实而又生动的图片展示我国环保面临的挑战，以通俗易懂的方式进行环保理论宣传，以生活中的实例指出污染环境的相关行为及其危害，以及在日常生活中保护环境的具体做法，以环保诚信签字等形式增强宣传的影响力。在环保诚信签字中，有市民说：“我知道要保护环境，却不知道怎么做。今天我了解了相当多的环保知识，知道了如何避免污染环境，如何有效保护环境，以后一定不会成为‘思想上的巨人，行动上的矮子’”。

运用《文化生活》中文化对人的影响的相关知识，分析该地开展环保宣传活动的积极影响。

已知A=2x，B是多项式，在计算B+A时，小马虎同学把B+A看成B÷A，结果得x+$\frac{1}{2}$，则B+A=____