GRE考试

【单选题】



网考网参考答案：D
网考网解析：
[*], which is clearly more than 65%, it appears that Column B is greater. Be careful! That would be true if a were positive, but no restrictions are placed on a. If a = 0, the columns are equal; if a is negative, Column A is greater. Neither column is always greater, and the two columns are not always equal (D). **Use TACTIC 1, Chapter 12. Just let a = 0, and then let a = 1. document.getElementById("warp").style.display="none"; document.getElementById("content").style.display="block"; 查看试题解析出处>>