简介:语言的学习与应用重在阅读与交流,能读懂、看懂文章并与人交流就是我们能力的表现。在高中英语教学中,阅读因此也变成了教师和学生学习与教学的重中之重。今天就外研社选修六Module3Roy’sstory这一教学案例来探索英语阅读教学中需要注意的问题。要想讲好一节课就得深入了解教材编排的特点、意图及文本折射出的深层次的内涵,大胆取舍与整合才能收到较好的效果。由于讲的是reading部分,所以锻炼学生跳读(skimming)和查读(scanning)的阅读能力就变成了重点,也需要认真思考怎么样设计这节课才能符合新课改的要求。本文就采取了学习、合作、展示、反思的教学模式。
简介:Tailoreddiodelasersingleemitterswithlong(6mm)resonatorsandwide(1.2mm)emissionaperturesthatoperatewith940nmemissionwavelengthwereassembledinnoveledge-cooledverticallystackedarrays,andusedtoconstructacompactandhighlyefficientfibercoupledpumpsourceforYb:YAGpulsedhigh-energyclasssolid-statelasers.Thenovelconfigurationisshowntoallowrepetitionratesof200Hzat1mspulseduration,atanoutputpowerof130Wpersingleemitter.Theemissionoftwostackedarrayswasthenopticallycombinedtorealizepumpmodulesthatdeliver6kWpeakpower(pulseenergy6J)froma1.9mmcorediameterfiber,withwallplugefficiencyof50%.Thisrepresentsasignificantimprovementintermsofdutycycleandelectro-opticalefficiencyoverconventionalsources.ThepumpmodulehasbeensuccessfullytestedattheMaxBornInstitute,Berlinduringtrialsforpumpingofdisklasers.