题目

在，1.01001000100001，2，3.1415，-，，0，，这些数中，无理数共有（ ）A. 2个 B. 3个 C. 4个 D. 5个 答案：【答案】A【解析】解：∵=3，=2，∴无理数有：2， -，一共有2个．故选A． （2010·浙江平湖中学高三10月月考）   28. ______ its size with that of the whole earth, we find the highest mountain does not seem high at all. A. When compared         B. Compared to         C. To be compared          D. Comparing