高三英語telephones-資料下載頁
【導(dǎo)讀】Step1Presentation. Whataretheydoing?12. 3. IntroductionStep2. 4. Step3.Reading. tothesequestions. anotherinthepast?anothertoday?Bythickheavywires.doesatelephonework?voice(soundwave)→electricalsignals—apairof. lines—electricalsignals→soundwave. Speakerphone. Step4listening. thereceiving. Early. telephone. aboutthewires?notpopular(tookalongtime). ─buy,hire─hear. handletelephone→wind. (electricity)→operator→。connect,note. .telephone┌①USA1878. directory├②1877,2600. └③1990,300million. voice(soundwave). electricalsignals. soundwave. notpopular(tookalongtime)buy,hirehear. telephone. operatorconnect. difficult. directory. ①USA1878. ②1877,2600. ③1990,300million. equipment. advances(electricalsignals. lightsignals↓). weaker→(withoutgetting. weaker,clear)→instead. lightsignals. Homework
【正文】 r connect difficult directory ① USA 1878 ② 1877 ,2600 ③ 1990 , 300 million equipment advances(electrical signals light signals↓) weaker → (without getting weaker,clear)→instead . ? voice electrical signals light signals electrical signals sound Homework Finish off the workbook exercises Try to retell the passage
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