当前学科:钻石检验员考试
  • 题目: 单选
    低型锆石的折射率、双折射为()

      A . 1.925—1.984,0.040
      B . 1.810-1.815,0.030
      C . 1.810-1.815,0.040

    答案: <查看本题扣1积分>

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