Which of the following statements is true? choose one: a. bronze was used as early as 4000 b. c.e. to replace less-desirable iron tools. b. bronze is harder than copper, so it retains a cutting edge sharper than that of copper. c. bronze is an alloy of copper and chromium. d. copper is not easily smelted, because extremely high temperature is required.
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Which of the following statements is true? choose one: a. bronze was used as early as 4000 b. c.e....
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