2019《聲現(xiàn)象》綜合測試題(參考答案)精品教育.doc

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11、氣1X 10320遠(yuǎn)處隆隆的雷聲預(yù)示著一場可能的大雨；鐵路工人用鐵 錘敲擊鋼軌，會從異常的聲音中發(fā)現(xiàn)松動的螺栓；醫(yī)生通過 聽診器可以了解病人心、肺的工作狀況等等。三、實(shí)驗(yàn)探究問答題21 （ 1 ）無規(guī)則的雜亂無章；（ 2）聲源；傳播；人耳；（3）建議學(xué)校依靠環(huán)保部門，依法清除學(xué)校附近的噪聲 源；改進(jìn)噪聲發(fā)生處的設(shè)備，減弱噪聲；關(guān)上教室的門 窗；在教室周圍多種樹等。22（ 1）因?yàn)槁曇舻膫鞑バ枰橘|(zhì)，乙房間的雙層玻璃間抽 成真空，無法傳聲。（ 2）聲音的傳播需要介質(zhì)，而光的傳播不需要介質(zhì)。23（1）探究音調(diào)和頻率的關(guān)系；（ 2）直尺或吉他或梳子等；（3）將尺子按在桌面上，一端伸出桌邊，使尺子每次振動 幅度大