题目在3.143.143.14,π\piπ,3.2122122213.2122122213.212212221,2+32+\sqrt{3}2+3,−227-\frac{22}{7}−722,−5.121121112…-5.121121112\ldots−5.121121112…中,无理数的个数为（ ）A.555B.222C.333D.444知识点：无理数章节：数与式 / 无理数与实数
