• 2022-05-29
    检索“高压反应装置”方面的文献,合理的检索式为:
    A: High(w)pressure and react* and device
    B: High(w)pressure and react* and apparatus
    C: High(w)pressure and react* and (device or apparatus or equipment)
    D: High(w)pressure(w)react(w)device
  • C

    内容

    • 0

      Air tends to flow from a _______ pressure area to a _______ pressure. A: high, lower B: low, higher C: high, high D: low, low

    • 1

      The high pressure in fuel injection system of the diesel engine is produced by the ().

    • 2

      At the same time, high blood pressure has become an problem.

    • 3

      Experts believe _____ obesity is often associated with a number of chronic diseases such as high blood pressure and high cholesterol problems.

    • 4

      High pressure, high efficiency and high speed are the characteristics of modern liquid chromatography. What is the main cause of high pressure?‍ A: Speeding up the flow rate and shortening the analysis time‍ B: Significantly improving the separation efficiency C: The use of fine particles as stationary phase D: The use of a packed capillary column‍