开放作文的基本写作结构What---陈述文字或图片所示客观信息，表明作者态度。Why---分析产生该客观信息的1-2个合理原因。How---作者提出1-2条可行性的措施或建议。测试报第6期开放作文写作提纲What---北极熊站在冰块上，惊恐地看着冰川正在以惊人的速度融化。Why---温室气体的过量排放直接导致全球升温，进而加速了冰川的融化；工厂大量排放废气、汽车等交通工具排放尾气等等都极大地增加了大气层中的温室气体含量。How---因此，我认为采取措施减少温室气体的排放是刻不容缓的，特别是工厂废气排放前要加强净化处理，倡导人们少开私家车多坐公交车，还有多植树造林。毕竟，全球升温将给人类带来灾难。Apolarbear,standingonasmallblockofice,wasshockedtoseetheicebergmeltingatanoverwhelmingrate,whichIthinkabigproblemtobesettledimmediately.Theover-emissionofgreenhousegasesdirectlyleadstotheglobalwarming,whichthereforeacceleratestheprocessoftheiceberg’smelting.Besides,toomanyfactoriesemitalargequantityofwastegasesandtoomanytraffictoolssuchascarsemitagreatdealofexhaust,whichgreatlyaddgreenhousegasestotheatmosphere.Asaresult,Ithinkitamusttotakemeasurestoreducetheemissionofthegreenhousegases;especiallyfactoriesmustpurifywastegasesbeforeemittingthem.Furthermore,weshouldcallonpeopletotakeabusinsteadofdrivingtheirprivatecarsifpossibleandplantmoretrees.Afterall,theglobalwarmingwillbringaseriesofdisasterstohumanbeings.
