单词：amplifier noise-equivalent circuit
放大器杂讯等效电路
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2 What are the two speakers doing? [A] Walking down a hill [B] Climbing stairs [C] Discussing a trip
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Ground - Connecting the Earth to electrical equipment with a conductor. This is done so current overloads (perhaps due to a lightning strike) can be safely diverted to the Earth. Ground Fault Circuit
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电信英语
今天我们要讲几个在美国总统大选的竞选阶段常会用到的习惯用语。美国总统大选每四年举行一次。在大选年的前一年,准备竞争本党总统候选人提名的人士就已经在各州积极展开竞选活动了，
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美国习惯用语
美国习惯用语