• 2022-06-10
    High technology is characterized by ______.
    A: economics of scale and high costs and high risks
    B: low costs and high profits
    C: much investment
  • A

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    • 0

      The aphotic zone (bottom of the ocean) will have ____ and ____ while the photic zone (surface of the ocean) will have ____ and ____. A: low temperature, low salinity; high temperature, high salinity B: low temperature, high salinity; high temperature, low salinity C: high temperature, high salinity; low temperature, low salinity D: high temperature, low salinity; low temperature, high salinity E: both have equal temperature and salinity

    • 1

      The main advantages of road transport are high capacity and relatively low costs compared to marine transport. A: 正确 B: 错误

    • 2

      ENUM类型的字段level定义为(LOW、MIDDLE、HIGH),ORDER BY level asc的顺序是 A: HIGH、LOW、MIDDLE B: LOW、MIDDLE、HIGH C: MIDDLE、LOW、HIGH D: HIGH、MIDDLE、LOW

    • 3

      What problem are the companies facing A: Rising fuel costs B: High staff turnover C: Declining profits D: Increased competition

    • 4

      Air transport is characterized by low fixed and high variable cost.