• 2022-05-31
    Primary standard can be used to prepare standard solution directly.
  • 内容

    • 0

      When measuring the dispersion of the sample mean, the statistics to be used are ( ) . A: Coefficient of variation B: The standard deviation C: Standard deviation of the mean D: Range value

    • 1

      Metal reinforcements will be used as a ______ measure until a new wall can be built. A: (A) virtual B: (B) temporary C: (C) standard D: (D) recent

    • 2

      Which digital cellular standard is used widely throughout the world except the United States?

    • 3

      When nickel ion in the nickel plating solution is titrated with the EDTA standard solution, the purple color of the end point is the color of the complex formed by the murexide indicator and the nickel ion.

    • 4

      The audit reports can be divided into standard audit reports and ( ) audit reports.