GRE考试

【单选题】



网考网参考答案：C
网考网解析：
The sum of the measures of the four angles in any quadrilateral is 360° [KEY FACT K1]. If the average of two of them is 60°, then their sum is 120° [TACTIC E1], leaving 240° for the other two angles, so their average is 120°. The columns are equal (C). document.getElementById("warp").style.display="none"; document.getElementById("content").style.display="block"; 查看试题解析出处>>