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【多选题】
按照热敏电阻阻值随温度变化的情况，主要可将其分为 热敏电阻和 热敏电阻两种，随温度上升电阻增加为 热敏电阻，反之为 热敏电阻。A.
正
B.
负
C.
正
D.
负
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A.
profit-making
B.
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C.
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A.
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B.
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C.
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D.
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