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可控整流电路带大电感负载时,无论是否接有续流二极管,其输出电压的波形都可能出现负值。( )

A. 对
B. 错

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单相全控桥式整流电路,带大电感负载时,如果不接续流二极管,则无论控制角有多大,每个晶闸管轮流导通180°。( )

A. 对
B. 错

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Since the beginning of this century, China has built many modern conference centers with underground parking, air-conditioning and ________ translation systems.

A. contemporary
B. simultaneous
C. meanwhileD along with

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While advertising offers

A. stimulus (刺激) to buy, sales promotion offers a(n) ________ to buy, but consumers must have their own reason to buy.Aincentive
B. motivate Cinspire D encourage

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As Crawford ________ heartbreak in his private life, his career soared to greater heights than he could have ever dreamed of.

A. deal with
B. handle with
C. contended with
D. satisfied with

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可控整流电路带大电感负载时,无论是否接有续流二极管,其输出电压的波形都可能出现负值。( )

A. 对 B. 错

单相全控桥式整流电路,带大电感负载时,如果不接续流二极管,则无论控制角有多大,每个晶闸管轮流导通180°。( )

Since the beginning of this century, China has built many modern conference centers with underground parking, air-conditioning and ________ translation systems.

While advertising offers

As Crawford ________ heartbreak in his private life, his career soared to greater heights than he could have ever dreamed of.

A. 对
B. 错