适用场景:教学资料总结,学生复习资料,课堂讲义材料
演讲要点:矢量与标量分类研究,运算法则差异分析,物理量正负意义探讨
行文逻辑:区分物理量→分析运算法则→探讨正负意义
标量和矢量:
(1)将物理量区分为矢量和标量体现了用分类方法研究物理问题.
(2)矢量和标量的根本区别在于它们遵从不同的运算法则:标量用代数法;矢量用平行四边形定则或三角形定则.
(3)同一直线上矢量的合成可转为代数法,即规定某一方向为正方向,与正方向相同的物理量用正号代入,相反的用负号代入,然后求代数和,最后结果的正、负体现了方向,但有些物理量虽也有正负之分,运算法则也一样,但不能认为是矢量,最后结果的正负也不表示方向,如:功、重力势能、电势能、电势等.
适用场景:口语备考资料总结,考试指导方案总结,教学参考材料总结
演讲要点:笔记记录方法分析,不同任务侧重点提炼,答题策略优化措施
行文逻辑:分析趋势→强调笔记→区分任务→明确重点→优化策略
1. 细节变得更多:
特别是task3这种校园话题,在conversation中,男生和女生闲聊的内容会更多些,personal information就会变得更多,记笔记的时候就会更忙。
2. 笔记制胜
平时练习的时候大家可能没有感觉,但是到了考场就会有一种突如其来的孤独感:文本,听力原文什么都没有,只有笔记和自己相依为命。
所以笔记是非常非常重要的。
3. 不同task的focus:
task3: 细节
task4: 故事主干
task5: 个人原因阐述
task6: 两个例子的完整性
在记笔记的时候,每一个task的侧重点都会有不同,请同学们一定注意。
尤其是task6,切忌狂记,一定要有选择性的去记笔记。
这个是6月份的一道考题
题目
using the examples from the lecture, explain two ways the railroad system changed business in the united states.
部分原文:
ok, so we’ve been talking about various factors that have changed the united states’ economy. one especially important factor is the development of railroads. when the railroad system expended to almost the us, it fundamentally changed the way business perform in this country.
for one thing, it expanded and the railroad enable companies to start selling their goods to all of the country. since trains could now transport merchandise all over us, companies could now sell good to customers pretty much anywhere of the country.
for example. there was a big company that sold quartz. the company started in a big city. and before the development of railroad, the company could only sell its quartz to people living in or near the city. but when the railroad expanded, the company could load their quartz on trains and have it delivered to all parts of the country.
第一段有没有同学很想不由自主记笔记的?但是你记完了就会发现:没有任何用!因为第一段是背景知识的交代和细节阐示。所以第一段基本上:不用记!
那从哪里开始?第二段!因为从第二段开始,professor才开始详细讲述railroad给美国经济带来的实际性的好处,所以,第二段才有关键信息涵盖在内。