第二代居民身份证背面“彩色照片”下方可以观察到光变光存储膜字符()。A.中国CHIN 发布时间:2017-11-12 07:15 │ 来源:www.tikuol.com 题型:单项选择题 问题: 第二代居民身份证背面“彩色照片”下方可以观察到光变光存储膜字符()。A.中国CHINAB.中国JMSFZC.中华人民共和国CHINAD.中华人民共和国JMSFZ
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题型:单项选择题 为检查某批电子元件的质量,随机抽取1%的产品,将测得结果整理成如下表的形式:质量标准规定:元件的耐用时间在1200小时以下为不合格品。若给定可靠度为95%,试确定:该批元件的合格品数量。 查看答案