【单选题】【消耗次数：1】
对于经常正、反转运行的调速系统，缩短起、制动过程的时间是提高生产率的必要因素。
①
正确
②
错误
参考答案：
复制
纠错
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薪酬受社会劳动生产率的影响和制约，关于薪酬水平和社会劳动生产率下列说法正确的是（ ）
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社会劳动生产率水平高，工资水平就高
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because
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Never mind.
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___________ , in order to make more profit, storekeepers try to supply not only enough goods but also different services for their customers.
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