题目内容

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

必要时,焊接电缆可以与油脂等易燃物料接触。()

焊接设备必须有足够的容量和单独的控制装置。()

焊机的一次电源线,长度一般不宜超过2~3米。()

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