问题
单项选择题
Of the following, which is most nearly equal to but not greater than 
？（）
A. 3.7
B. 3.8
C. 3.9
D. 4.0
E. 4.1
答案
参考答案：B
解析：
The easiest way to approach this question is to square the answers and see which one is closest to 15.3.7×3.7=13.69; 3.8×3.8=14.44; 3.9×3.9=15.21. 3.9 is the closest, but it is greater than 
so B is the correct answer.