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。()
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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.
The saying "sui generis" (Para. 5) is closest in meaning to _____.
A. unique
B. touching
C. overwhelming
D. mysterious
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