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1、人体对周围世界的感知——耳和听觉耳朵的结构耳的各部分功能耳朵的卫生和保健1、噪声对听觉有什么影响？2、怎样保护外耳道？3、怎样预防中耳炎？4、怎样保护鼓膜？保护耳和听力1、减少和消除噪声2、不用尖锐的东西挖耳朵3、遇到巨大的声音，迅速张开口，或者堵耳、闭嘴。保持鼓膜大气压力平衡。4、鼻咽部有炎症，及时治疗，避免中耳炎5、不让污水进入外耳道，避免其感染。还有哪些感觉器官？鼻子闻舌头尝皮肤冷、热、痛等刺激练习与思考1、能够感受头部位置变动的情况的是（）A听小骨B半规管C前庭D耳蜗2、有对声波敏感的感觉细胞的是（）A听小骨B半规管C前庭D耳蜗3、听觉形成的过程，下列正确的是（）A
2、声音→外耳道→鼓膜→听小骨→耳蜗→听神经B声音→外耳道→耳蜗→鼓膜→听小骨→听神经C声音→外耳道→鼓膜→耳蜗→听小骨→听神经4、下列说法不正确的是（）A不要用尖锐的东西挖耳朵B鼻咽发炎时，容易引起中耳炎C遇到巨大响声，要迅速张开口D噪声对听觉不会造成伤害Nov.10书面表达DearJack,It’sverykindofyoutowritemeandletmeknowaboutyourbeautifulcity.NowI’dliketotellyousomethingaboutmyhometownZhengzhou.ThecitystandsonthebankoftheHua
3、ngheRiver.Itisabeautifulplaceforpeopletolivein.Itseconomyhasbeendevelopingrapidlyinthepasttenyears.Newfactories,housesandroadshavebeenbuilt.Moreschoolsandhospitalsareavailableforitspeople.However,therearestillsomeproblems,suchaswaterandairpollutionandheavytrafficinrushhours.Inmyopinion,Zhe
4、ngzhoushoulddevelopitseconomyscientifically;Iwouldalsothinkthatthegrowthofitspopulationshouldbebroughtundercontrolsothatwe’llhaveabetterhometowninfuture.Yours:wangwenThecitystandsonthebankoftheHuangheRiver.Itisabeautifulplaceforpeopletolivein.Itseconomyhasbeendevelopingrapidlyinthepastteny
5、ears.Newfactories,housesandroadshavebeenbuilt.Moreschoolsandhospitalsareavailableforitspeople.However,therearestillsomeproblems,suchaswaterandairpollutionandheavytrafficinrushhours.Inmyopinion,Zhengzhoushoulddevelopitseconomyscientifically;Iwouldalsothinkthatthegrowthofitspopulationshouldb
6、ebroughtundercontrolsothatwe’llhaveabetterhometowninfuture.DearJack,It’sverykindofyoutowritemeandletmeknowaboutyourbeautifulcity.NowI’dliketotellyousomethingaboutmyhometownZhengzhou.Yours:wangwen学生作文…Zhengzhouisabeautifulcitywithalonghistory,itliestoYellowRiverandthesceneryisbeautiful,ital
7、sohasfreshair.Inmyopinion,zhengzhouisagoodchoiceforpeopletosettledown.Withtheboomofeconomy,varietiesoffactories,buildingswerebebuilt.Newandcleanroadsarefromhereandthere,trafficnetsareconvinenttoo.Buteverycoinshastwosides,withthedevelopmentofeconomy,waterpollut
