Module 5 A Lesson in a LabSection Ⅳ Writing写作指导Ⅰ.佳作展示与背诵下面是一节化学课的实验报告,请根据表格内容,用英语写一篇短文,发表在校园网双语学习专栏中进行交流。实验目的制取氧气实验用品高锰酸钾,试管,铁架台,酒精灯,集气瓶实验步骤1.将适量高锰酸钾放入试管2.将试管固定在铁架台上,用酒精灯加热3.收集氧气检验氧气把带火星的木条放在集气瓶口,木条燃烧,表明氧气集满实验结论高锰酸钾受热分解可产生氧气注意:1.词数:100 左右;2.可适当增加细节,使行文连贯。3.参考词汇:高锰酸钾 potassium permanganate;铁架台 iron support;酒精灯 alcohol burner;集气瓶 gas jarOne possible versionHow to produce oxygenHere is a report on a simple chemical experiment,which shows us how we can produce oxygen.Aim:to produce oxygenApparatus:potassium permanganate,test tube,iron support,alcohol burner,gas jarMethod:1.Put a proper amount of potassium permanganate into a test tube.2.Fix the test tube to an iron support and then heat the tube with an alcohol burner.3.After a while,we can collect oxygen with a gas jar.Result:If a lighted piece of wood is put around the mouth of the gas jar , it burns,which shows that the gas jar is full of oxygen.Conclusion:Potassium permanganate can be broken down to produce oxygen when heated.Ⅱ.思路点拨1.本文为科学实验报告,属于说明文。说明文是解说事物、阐明事理、给人以知、教人以用的。科学实验报告文体严谨,以传授知识为主,要求内容真实,措辞准确。时态常用一般现在时,多用祈使句和被动语态。2.正文可运用排列式:首先说明实验目的——制取氧气。接着交代实验用品——实验仪器的具体名称。重点阐述实验步骤——操作的先后顺序。最后总结实验结论——高锰酸钾受热分解可产生氧气。3.常用词汇(1)描写实验目的:carry out an experiment to find out ...;The aim of the experiment is to find ...;with the purpose of discovering ...;do research on;in the hope of ...(2)描写实验用品:To carry out/make/do/perform the experiment...