题目

平方根等于其本身的实数是：__________。 答案：【答案】0【解析】根据平方的特性从三个特殊数0，±1中找，即可得到答案.解：∵02=0，∴平方根等于本身的是0；故答案是：0Tom is only ______. I don’t think a _______ boy should be allowed to drive. A．fourteen-year-old;fourteen-year-old B．fourteenyearsold;fourteen-year-old C．fourteenyearsold;fourteen-years-old D．fourteen-year-old;fourteenyearsold