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(满分100分,90分钟完成) (A)基础知识达标检测一、选择题(每小题4分,共40分)1.一1{的倒数是().(A)詈(引专(c)一了8(D)一i5 2.如果l a1=一a,那么a的取值范围是( ).(A)a0 (B)a≤0(C)a0 (D)a≥0 3.化简√(I.4l一/2)j的结果是( ).(A)l(B)0(c)1.4l一√2(D)j!一1.41 4.汁算一2x·』
(Out of 100 points, 90 minutes to complete) (A) the basic knowledge of a standard test a multiple choice questions (each small question 4 points, a total of 40 points) 1. 1 1 {countdown is () If a1 = a, then the range of a is () a0 (B) a≤0 (C) a0 (D) a≥0 3 Simplify √ (I.4l a / 2) The result of j is () l (B) 0 (c) 1.4l a √2 (D)