阅读下面短文，掌握其大意，然后从每小题所给的A、B、C、D四个选项中，选出一个最佳选项。

    School education is very important and useful. Yet no one can  1  everything at school and a teacher can't teach his students everything they want to know. His 2  is to show his students how to learn. He teaches them how to read 3 how to think. So much more is to be learnt outside school by the students 4.

     It is always more  5 to know how to study by oneself. It is quite  6  to learn something, but it is difficult to use it to solve problems. Great inventors (发明家) don't get everything  7  school, but they still can 8 many things and change the world a lot.

     How can the inventors do all of these? One of the answers is: they   9  how to study. A lot of things are not learnt in the classroom. They get a lot of knowledge by reading outside school. They work hard and never  10  their dreams.

  2010年起，北京市专业气象台制作了红叶观赏指数（黄栌等植物叶片变红的比例越大，指数越高，它是确定最佳观赏区的依据），每天向社会公布。下表是2012年依据红叶观赏指数预报的部分数据。读表，回答问题。

跨越宁波的第一条高铁——杭甬客运专线，将于2013年6月初正式通车运行。届时，临海铁路省内高铁路段将全线贯通，长三角地区“2小时铁路交通圈”基本成型。结合下图完成下题。

从宁波开往杭州的列车对铁轨的磨损程度（   ）

已知函数 f（x）=a^x+x﹣b的零点x_b∈（n，n+1）（n∈Z），其中常数a，b满足2^a=3，3^b=2，则n的值是（　　）