论文部分内容阅读
一、一元选择(每小题2分,共30分) 1.一2的相反数是( ). 1 l (A)2(B)一2(c)—il (D)一_二 二 一 2.(一n’)。的计算结果是(). (.4)Ⅱ(B)一Ⅱ一’ (C)n一。(,J)“。 3.与三角彤二三个顶点距离相等的点.足这个‘:角形的( ). (A)三条中线的交点 (B)n二条角平分线的交点 (c)三条高线
A, a dollar choice (each small question 2 points, a total of 30 points) 1. The opposite of a 2 is () 1 l (A) 2 (B) a 2 (c) 2. (a n '). The calculation result is (). (.4) Ⅱ (B) a Ⅱ a '(C) n a. (, J). "3. The point at the same distance from the vertex of the triangle at the top and the bottom of the triangle. (A) The intersection of the three centerlines (B) n The intersection of the bisector of the two corners (c) Three altitude