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【单选题】
用万用表R×1k挡测二极管,若红表笔接正极,黑表笔接负极时读数为50kΩ;换黑表笔接正极,红表笔接负极时,读数为1Ω,则这只二极管的情况是()。A.
内部已断路不能用
B.
内部已短路不能用
C.
没有坏,但性能不好
D.
性能良好
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皮皮学刷刷变学霸
举一反三
【简答题】两个大小 且极性 的输入信号称为共模信号;
【单选题】我国的企业年金为( )，即企业年金计划不向职工承诺未来年金的数额或替代率，职工退休后年金的多少完全取决于职工和个人的缴费金额及投资收益。
A.
确定收益型
B.
确定缴费型
C.
确定金额型
D.
确定利率型
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