题目

---What are you doing for vacation? --- We ‘re _______. A. go boating        B. visiting  southern  cities   C. going hike 答案：B2．计算：（1）$\sqrt{{{（{-4}）}^2}}+\root{3}{{{{（{-4}）}^3}}}×{（{-\frac{1}{2}}）^2}$ （2）求（x-2）2=9中x的值．