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【多选题】
对于低压动力系统配电方式正确的说法是( )。A.
当设备为大容量或负荷性质重要，或在有特殊要求的车间、建筑物内，宜采用树干式
B.
在正常环境的车间或建筑物内，当大部分用电设备为中、小容量，且无特殊要求时，放射式配电
C.
平行的生产流水线或互为备用的生产机组，不同的回路配电；同一生产流水线的各用电设备，同一回路配电
D.
在高层建筑物内，当向楼层各配电点供电时，宜采用分区树干式，但部分较大容量的集中负荷或重要负荷，低压配电室以放射式配电
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A.
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B.
“I hope you’ll be very happy.”
C.
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D.
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A.
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B.
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【单选题】Nanotechnology has resulted in a wide range of amazing, practical discoveries such as stain-resistant trousers and self-cleaning toilets.
A.
Y
B.
N
C.
NG
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