• 2022-06-27 问题

    金属的位错密度会被以下哪些影响? A: transmittance B: ductility C: deformation D: cold work

    金属的位错密度会被以下哪些影响? A: transmittance B: ductility C: deformation D: cold work

  • 2022-06-27 问题

    ‍金属的位错密度会被以下哪些影响? ‍ A: Transmittance B: Ductility C: Deformation D: cold work

    ‍金属的位错密度会被以下哪些影响? ‍ A: Transmittance B: Ductility C: Deformation D: cold work

  • 2022-06-07 问题

    Measuring a colored solution by using of Beer's law, when the concentration is c, the transmittance is T. If the concentration is changed to c/3 and other conditions remain unchanged, then T is ______ .when the concentration is 2c, T is ______

    Measuring a colored solution by using of Beer's law, when the concentration is c, the transmittance is T. If the concentration is changed to c/3 and other conditions remain unchanged, then T is ______ .when the concentration is 2c, T is ______

  • 2022-07-24 问题

    The absorption curve is ( ). A: The curve of the relationship between the concentration of light-absorbing substance and absorbance. B: The curve of the relationship between the concentration of light-absorbing substance and transmittance. C: The curve of the relationship between the wavelength of incident light and the thickness of light-absorbing substance solution. D: The curve of the relationship between the wavelength of incident light and the absorbance of a light-absorbing substance.

    The absorption curve is ( ). A: The curve of the relationship between the concentration of light-absorbing substance and absorbance. B: The curve of the relationship between the concentration of light-absorbing substance and transmittance. C: The curve of the relationship between the wavelength of incident light and the thickness of light-absorbing substance solution. D: The curve of the relationship between the wavelength of incident light and the absorbance of a light-absorbing substance.

  • 2022-06-29 问题

    In the determination of UV-vis spectrophotometry, the function of reference solution is ( ). A: Adjust the zero point of the transmittance of the instrument. B: Absorb the light wave needed in the determination of light. C: Adjust the intensity of the incident light. D: Eliminate the influence of all substances other than the substances to be measured such as reagents on incident light.

    In the determination of UV-vis spectrophotometry, the function of reference solution is ( ). A: Adjust the zero point of the transmittance of the instrument. B: Absorb the light wave needed in the determination of light. C: Adjust the intensity of the incident light. D: Eliminate the influence of all substances other than the substances to be measured such as reagents on incident light.

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