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There was a knock at the door．It was the second time someone___________(那晚打扰我)．

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电动机变频调速系统主要包括异步电动机、变频器、负载及传动机构几部分外，还包括哪个部分。()
A控制环节
B变压器
C变速器
D调频器

it can have a 9 effect on their kids.

fares of London would result in increased and more 6 transportation within city When the plans were unveiled to the citizens of London,

Wren realized that the Great Fire would not have been so 4 if the city had been better laid out.