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【单选题】
利用万用表检测二极管正负极时,将万用表拨到二极管测量档,表笔与二极管的阳、阴极相连,如果读数在0.2~0.7之间,说明红色表笔连接的()极,黑色表笔为()极。
A.
阳，阴
B.
阴，阳
C.
阳，阳
D.
阴，阴
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