判断题

过共析钢随着含碳量的增加,珠光体量逐渐增多。( )

答案：错误

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4. Electron A is fired horizontally with speed 1.00 Mm/s into a region where a vertical magnetic field exists. Electron B is fired along the same path with speed 2.00 Mm/s. Which electron has a path that curves more sharply?

A．A does.
B．B does.
C．The particles follow the same curved path.
D．The particles continue to go straight

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