题目内容
The Gold Rush transformed California from a sleepy society into one that was wild, unruly, ethnically-diverse, and violent.
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The Gold Rush provided the United States with its richest mines, greatestforests, and most fertile farm land and made America one of the richest countries.
The Gold Rush was a period of feverish migration of workers into the arca which witnessed a dramatic discovery of commercial quantities of gold. 答案:
工厂某材料的时区净需求如下表所示。根据按需订货批量法，第1个时区的订货量为（）。
某工厂某材料的时区净需求如下表所示。根据固定订货批量法，假设固定批量为60，第4个时区的订货量是（）。
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