统一性

　　亲爱的同学们：新的学期，新的起点，也就意味着新的机遇与挑战，新的拼搏与奋斗。高三在我们的关注中如约而至，征战高考的号角已经吹响，时间不容置疑地把我们推到命运的分水岭。在慢慢品尝高三滋味的同时，我们正在加速长大和成熟，过去对时间的浪费让我们痛心，父母期待的目光更加殷切和慈祥，一夜之间，忽然有了更多的知识需要我们去拥有，我们对未来的思考更加清晰。是的，同学们，面对未来，你可能有无数条道路，但一旦进入高三前进的队列中，作为志存高远的热血青年，你一定会义无返顾的说，高三，我来了；高考，我要成功!

　　世界的物质统一性

　　[原理] 世界的本质是物质，世界上先有物质后有意识，物质决定意识，意识是客观存在在人脑中的反映

　　[方法论] 这一原理要求我们在想问题、办事情的时候，要一切从实际出发，理论联系实际，解放思想，实事求是，与时俱进，在实践中检验和发展真理

首先，一个段落必须有一个中心即主题思想，该中心由主题句特别是其中的题旨来表达。整个段落必须紧扣这个主题(stick or hold to the topic)，这就是段落的统一性(unity)。其次，一个段落必须有若干推展句，使主题思想得到充分展开，从而给读者一个完整的感觉，这就是完整性(completeness or adequateness)。下面我们就对这两个标准分别加以说明......

1.统一性

一个段落内的各个句子必须从属于一个中心，任何游离于中心思想之外的句子都是不可取的。请看下例：

Joe and I decided to take the long trip we'd always wanted across the country. We were like young kids buying our camper and stocking it with all the necessities of life. Bella bakes the best rhubarb pie. We started out in early spring from Minneapolis and headed west across the northern part of the country. We both enjoyed those people we met at the trailer park. Joe received a watch at his retirement dinner. To our surprise, we found that we liked the warm southern regions very much, and so we decided to stay here in New Mexico.

本段的主题句是段首句，controlling idea(中心思想)是take the long trip across the country。文中出现两个irrelevant sentences，一个是Bella bakes the best rhubarb pie，这一段是讲的是Joe and I，中间出现一个Bella是不合适的。还有，Joe received a watch at his retirement dinner这一句更是与主题句不相关。考生在作文卷上常常因为造出irrelevant sentences(不相关语句)而丢分，值得引起注意。再看一个例子：

My name is Roseanna, and I like to keep physically fit. I used to weigh two hundred pounds, but I joined the YMCA for an exercise class and diet program. In one year I lost eighty pounds. I feel much better and never want to have that much weight on my five-feet frame again. I bought two new suitcases last week. Everyday I practice j...