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第一章直线Ａ组一、选择题１．已知Ａ、Ｂ为数轴上两点，其坐标分别为ｘ１、ｘ２，若Ｘ２＝３，ＡＢ＝４，则ｘ１等于（）．Ａ．－ＩＢ．ＩＣ．一１或ＩＤ．一卫或７２．已知Ａ（ｓｃｏｓａ，ｓｓｉｎａ），Ｂ（４ｃｏｓｇ，４ｓｉｎｇ），则ＩＡＢＩ的最大值是（）．Ａ．...
Chapter One Line A Group I. Multiple Choice Question 1. It is known that A and B are two points on the axis and their coordinates are x1 and x2 respectively. If X2=3 and AB=4, then x1 is equal to (). A. -IB. IC. One 1 or ID. One or 72. Known A (scosa, ssina), B (4cosg, 4sing), then the maximum value of IABI is (). A. ...