• 2022-05-31
    执行代码m[-c("poor","excellent","good","poor") ] patient[-factor(m) ] patient后,patient的因子水平下列说法正确的是( )
    A: poor good excellent
    B: poor excellent good poor
    C: excellent good poor
    D: 以上都不对
  • C

    内容

    • 0

      Being poor, these children are less __________ to go to college or get a good job.

    • 1

      I've been in ______ health for months and feel very fit. A: poor B: good

    • 2

      Which one in the following cannot be a good reason for making a complaint? A: poor quality B: good after-sale service C: delayed delivery

    • 3

      Without enough sleep, people would be ______. A) in poor health C) physically energetic B) in good health D) mentally energetic A: Without enough sleep, people would be ______. B: in poor health C: in good health D: physically energetic E: mentally energetic

    • 4

      When buying birthday presents, I find my idea is ______. A: poor B: good C: rich