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初一年级一、选择题1.若 a2 + 1的相反数是 3 ,则 -3a的相反数为( ) .(A) 9 (B) 4 (C) -9 (D) -2 42 .在数轴上 -2与 -5之间的有理数有( ) .(A)无数个 (B) 3个 (C) 2个 (D) 4个3 .计算 (-2 ) 99+ (-2 ) 1 0 0 的结果为 ( ) .(A) -2 (B) 2 99 (C) -2 99
In the early grade one, multiple choice questions 1. If the opposite number of a2 + 1 is 3, the opposite number of -3a is (). (A) 9 (B) 4 (C) -9 (D) -2 42 . The rational numbers between -2 and -5 on the axis are (). (A) Innumerable (B) 3 (C) 2 (D) 4 3. Calculate (-2) 99+ (-2) 1 0 The result of 0 is () .(A) -2 (B) 2 99 (C) -2 99