任务型阅读
A. The plan, known as the APEC China Year 2014 and Low Carbon Model Town World Campaign(低碳示范镇的世界运动), has already organized more than 20 science and research institutes and enterprises and 50 experts to assess (评估)Shenzhen as an "International Low Carbon City".
B. Huo Zun,23, is the writer of the song ROLL the Beaded Curtain (《卷珠帘》). He was the winner of the TV program Sing My Song (《中国好歌曲》), a talent show. His beautiful melody and Chinese flavor lyrics won him the best song and millions of fans.
C. People gathered at the Hull Truck Theatre and cheered with joy when Minister Maria Miller announced Hull as the UK's 2017 City of Culture. Every four years, the UK government chooses a city for the award. It's hoped that more people will travel to the winning place, making it more popular.
D. A company in Poland plans to build hotels which can be moved to any chosen and suitable place in the sea. The hotel rooms can float about 50 feet below the surface. The whole building is underwater, and you can only get into it by swimming down and entering through an opening at the bottom. There is a television, air conditioning and Wi-Fi in the lodge.
E. International Nurses Day is celebrated around the world every May 12, the anniversary of Florence Nightingale's birth. She spent all her life taking good care of those patients. She set up the first nurse school in London.
，据市场分析每辆客车营运的总利润
y(单位：万元)与营运年数x(x∈N)为二次函数关系(如图)，则每辆客车营运多少年，其营运的年平均利润最大（ ）