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焊接设备的空载电压一般为300V。()

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特殊情况时，利用厂房的金属结构、轨道、管道或其他金属物体搭接起来作电焊导线电缆。()

What is true about Earl Millers research？

A. It discovers neuroplasticity.
B. It is the first study of this kind.
C. It studies one environmental feedback.
D. It attests to one cause of neuroplasticity.

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The saying "sui generis" (Para. 5) is closest in meaning to _____.

A. unique
B. touching
C. overwhelming
D. mysterious

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必要时，焊接电缆可以与油脂等易燃物料接触。()

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