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OpenStudy (is3535):
Which was not a labor-saving device that first appeared around the beginning of the twentieth century? A. spinning wheel B. vacuum cleaner C. washing machine D. sewing machine
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OpenStudy (anonymous):
Hello! The answer is A. spinning wheel. The spinning wheel was created in 1234 while the vacuum cleaner was invented in 1901, the washing machine in 1908, and the sewing machine in 1918
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