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【多选题】
下列器件中,属于不可控元器件的是()A.
二极管
B.
三极管
C.
晶闸管
D.
电力二极管
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A.
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B.
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C.
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D.
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E.
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A.
She has done half of it already.
B.
She agrees that it is very long.
C.
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D.
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