1.论证观点段
　　论证观点段一般出现在论证观点类作文的第二段，其基本的句型构造是：先用一句话承上启下，引出接下来对上段提出观点的论证；然后用3-4句话列举论据来论证观点的正确性。

　　例
　　Directions : For this part , you are allowed 30 minutes to write a composition on the topic Knowledge is Power . You should write at least 120 words , and base your composition on the outline given below in Chinese :
　　1.知识就是力量。
　　2.试举例论证。

　　第二段：论证观点段
　　(1)The infinite power of knowledge has been proved by many remarkable examples . (2) A case in point is the function of knowledge in the development of emphasize knowledge is doomed to fall behind others . (4) For another example , in piople's normal life , knowledge plays a vital role . (5) It is knowledge that has brought us such hi-tech products as computers and televisions which make our life enjoyable and colorful .