直线部分在高考试卷中常以客观题出现,考查基本概念和基本能力,但因学生平时容易忽视相关概念的内涵和外延,常常会出现一些“对而不全”、“画蛇添足”类的错误.1忽视倾斜角的范围致错例1直线bx+ay=ab(a0,b0)的倾斜角是()(A)arctan(-ba).(B)arctan(-ab).(C)π-arctan(ba).(D) In the high test volume, the straight part often appears with an objective question, examining the basic concepts and basic abilities. However, due to the fact that students tend to overlook the connotation and extension of the relevant concepts, there are often some mistakes such as “incomplete but not complete” or “overdraw”. The range of tilt angle is erroneous. Example 1 The inclination angle of the straight line bx+ay=ab(a0,b0) is ()(A)arctan(-ba).(B)arctan(-ab).(C)π-arctan( Ba).(D)