• 2021-04-14
    【单选题】在个案选择中,工作年龄(NL)处于20-30岁间的条件表达式为()
    A. 20<=NL<=30
    B. 20<= NL & 30>=NL
    C. 20<= NL | NL <=30
    D. 20<= NL & 30<=NL