一、缤空题1.把命题“对顶角相等”改写成:如果,那么2.在命题“直角都等于90O’,中,题设是,结论是3.在①“同旁内角互补”、②“同角的余角相等”这两个命题中,真命题是,假命题是a .D辱么·4.判定一个命题是假命题,只要___就行了.5,如图1,直线“、b被直线:所截,且a//b,若乙1=11 First, a blank question 1. Rewrite the proposition “equal to the vertex angle” as follows: If, then, 2. In the proposition “Right angle equals 90O,” the question is set to yes, the conclusion is 3. In 1 “complementary to the internal angle” In the two propositions of “2 equal angles of the same angle”, the true proposition is that the false proposition is a.D indiscriminate. 4. To determine a proposition is a false proposition, as long as ___ is on the line .5, as shown in Figure 1 , The straight line “b” is cut: and a//b, if B = 1