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【单选题】
直流输出电压的平均值高于输入电压的变换电路称为( )电路,又叫Boost电路。A.
降压变换
B.
升压变换
C.
升降压变换
拍照语音搜题，微信中搜索"皮皮学"使用
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B.
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C.
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D.
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A.
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