20xx秋九年級(jí)英語(yǔ)全冊(cè)u(píng)nit6whenwasitinventedsaturday復(fù)現(xiàn)式周周練課件新人教版-展示頁(yè)
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【正文】 d be elected. (Section B 3aSelf Check) The washing machine The washing machine is also very useful in our daily lives. It helps us to wash our clothes so that we can spend our time in doing more important things. Early Versions The washboard was invented in 1797. James King came up with the idea and invented an early version of the washing machine in 1851 that was handoperated and shaped like a drum.③ (Section B 3aSelf Check) HandPowered William Blackstone created a washing machine for his wife in 1874. A wooden paddle(槳 ) moved the clothes around a series of wooden pegs(栓 ) to knock dirt loose. Blackstone began building and selling his new invention for $.
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