对于valprices=Map("book"-5,"pen"-2,"sticker"-1)结果说法错误的是?()A、prices("sticker")//等于1B、(prices+("shoes"-30))("shoes")?//等于30C、(prices-"pen")("book")//等于5D、prices("sock")//等于0

对于valprices=Map("book"->5,"pen"->2,"sticker"->1)结果说法错误的是?()

  • A、prices("sticker")//等于1
  • B、(prices+("shoes"->30))("shoes")?//等于30
  • C、(prices-"pen")("book")//等于5
  • D、prices("sock")//等于0

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