• 2022-06-15
    "Sound", as defined by the psychologist, ______.
    A: can be measured in the same way that "noise" is measured
    B: may be extremely harmful to health
    C: is not at all different from "noise"
    D: can be measured by machines
  • D

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    • 0

      As with many other physical quantities, the mass(质量) of a body can be measured in several different ways.

    • 1

      It can not be measured(衡量)______ terms of money. A: on B: of C: for D: in

    • 2

      The differential absorption of the x-ray beam by different tissues produces various image density, which on CT scans are measured in Hounsfield units (), which of the following description below is NOT correct: ( ) A: Air is measured -1000 HU B: Fat is measured -120 Hu C: Bone is measured +1000 Hu D: Calcification is measured from 80 to 100 Hu

    • 3

      What can be measured in the warming-up area? A: speed B: heart rate C: calories D: all of the above

    • 4

      Frequency can be measured by UT801 multi-meter. A: 正确 B: 错误