第十七章 做弹弓
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第一节课是物理课，物理老师匡海涵同时也是教务主任，和那些市级，省级重点中学的专职学校领导不同，在镇初中能够担任校长，政教主任的，除了在教委学区有些关系外，还得有一套教书授课的好本事。更多小说ltxsba.com
物理课从初二开课，初二学的是力学基础原理，初三是电磁原理。
秦安对初三物理课很感兴趣，他记得在学完电路后，他就开始拆卸家里的每一件电器，电视，洗衣机，收音机，甚至包括电表和灯泡。
他嫌宿舍楼的总表经常跳闸，保险丝烧断，他在知道保险丝原理后，就把保险丝换成了铁丝，结果引起了一场小火灾，虽然没有造成什么重大损失，但整整一个星期，秦淮和李琴都在和别人赔礼道歉，秦安也被揍了个半死。
秦安一直觉得初中和高中学习到的知识，才是真正的素质教育精髓……只要没有考试。
靠着这些基础电路知识，秦安在以后的日子里，电视，冰箱，微波炉什么的，只要不是电路板严重损坏，他基本都能修。
匡海涵是个高高瘦瘦的中年男子，和父亲秦淮差不多年纪，虽然他讲的很精彩，但是秦安在简单翻了几页之后，就觉得没有听的必要了。
一堂课，一般就讲那么几页内容。
秦安拿出一张白纸和铅笔，在纸上写写画画。
孙荪时不时地瞟一眼，一开始只当秦安又在开小差，但看着他在上边标注着角度，矢量线，坐标，还写下一堆计算公式，孙荪恍然大悟，原来他是在复习初二的力学物理。
下课后，秦安还是没有停笔，但是在他原来简单的图纸上多了一些图形构造，不再像一张力学图了。
“你画了什么，画了一整节课。”虽然孙荪不喜欢秦安在上课时做一些奇奇怪怪的事情，但终究有些好奇。
“我要做一把弹弓，威力无穷，百发百中的那种。”秦安趴在桌子上，聚精会神的模样倒像在做一件很了不起的事情。
孙荪拍了拍自己的额头，秦安已经没救了，自己居然以为他在复习力学物理。
秦安今早虽然唬了一下屠钢，但他并不认为下次再碰到屠钢，还能唬住他。
成年人和未成年人最大的区别，并不是身体上的力量，而是成年人融入社会后，他总有一些社会性的力量，让他可以处理许多危机，并且更有底气，在感受到危险时，不能靠自己独立解决时，就手足无措。
未成年人就不一样了，他们能够独立解决的问题不多，也难以掌握社会性力量为他们所用。
像屠钢这样的混子，虽然只有十五岁，但他家的汽修厂那些汽修工，就相当于可以为他所用的社会性力量，这也是其他孩子畏惧他的真正原因。
秦安从一个成年人转换成未成年人的身份，总有一些失去掌控他习惯的社会性力量的危机感，对于一个十三岁的孩子来说，带一把匕首在身上，发挥不了太大的作用，有时候还会给自己带来更大的危险。
秦安决定做一把弹弓，弹弓这东西，一般人只看做小孩子的玩具，但真正的弹弓玩家都知道，拥有一把强力的复合弹弓，使用八股胶管作为动力，稍稍练习之后，配合复合弹弓的稳定性和精准性，用一厘米直径的钢珠击中五十米外直径十厘米的物体，并不太难。
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