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流程管理推进信息化之前没有必要对流程进行优化。()

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国家电网建立资金监控中心，集团内每一分钱都有迹可循，十分钟更新一次绩效分析，每秒钟更新结算

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焊接变位机通过()的旋转和翻转运动，使所有焊缝处于最理想的位置以便于进行焊接。

A. 工件
B. 工作台
C. 操作者
D. 焊机

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CO2气体保护焊用的CO2气瓶采用电热预热器时，电压应低于()。

A. 60V
B. 36V
C. 12V
D. 6V

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If the water temperature had increased after submerging resistor B, which of the following statements would have been most accurate？

A. The fact that the water temperature increased after submerging Resistor B shows that resistor B is a thermistor.
B. The fact that the water temperature increased after submerging Resistor B shows that resistor B is not an ohmic device.
C. Since the measured current was the same when the initial water temperature was 23°C as when it was 25°C,resistor B is an ohmic device.
D. Since the measured current was the same when the initial water temperature was 23°C as when it was 25°C,resistor B is not a thermistor.

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