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【单选题】
对于P型半导体来说，下列说法正确的是：( )。A.
在本征半导体中掺入微量的五价元素形成的;
B.
它的载流子是空穴;
C.
它对外呈现正电;
D.
它的多数载流子是空穴。
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A.
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B.
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C.
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D.
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B.
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