-It was nice and interesting.A.Where did you go on vacationB.When did you go on vacationC.How was your vacationD.Did you enjoy your vacation【答案】C【详解】句意：一你的假期怎么样...

(1)去掉绝对值符号后的正负号的确定，(2)0没有倒数，考点6：平方根、立方根、次方根的概念考核要求：(1)理解平、立方根、次方根的概念；(2)理解开方与方根的意义，注意平方根和算术平方根的联系...