题目

  The organization broke no rules, but ______had it acted responsibly. A. neither B. so         C. either      D. both 答案：A下列计算正确的是（　　）A. x6÷x3＝x3B. x3+x3＝2x6C. （x3）3＝x6D. 2x3﹣x3＝1