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2 选择题 (1)(江西省)无理数是( ) (A)无限循环小数 (B)开方开不尽的数 (C)除有限小数以外的所有实数 (D)除有理数以外的所有实数 (2)(陕西南郑县)若a、b互为相反数,c、d互为倒
2 Multiple-choice questions (1) (Jiangxi Province) Irrational numbers are () (A) Infinitely recurring decimals (B) Open-ended numbers (C) All real numbers except finite numbers (D) All real numbers except rational numbers ( 2) (Nanzhen County, Shaanxi Province) If a and b are opposite numbers, c and d are inverted