Eight grade math review questions one, multiple choice questions. (* * * 24 points for each item) 1. The following statements are correct: (a) The square roots of a and 0 are 0 B, 1 yes 1C,-1 yes-1 D, (-1). A-b D, a>b>0, and then |a| >|b|3. The following operations are correct: (A) A, b, c, (x+ 1)0= 1 D, 53? 63=3034. It is known that A is a real number, and the correct result of simplification is (D )A, B, C, D, 5. In quadrilateral ABCD, O is the intersection of diagonal AC and BD, and the conditions for judging this quadrilateral as a square are () A, AC=BD, AB//CD B, AD//BC. ∠BAD=∠DOB C, AO=BO=CO=DO,AC⊥BD D, AO=CO, BO=Do, AB=BC6, as shown in the figure, in □ABCD, EF//BC, GH//AB, EF and GH intersect at O, and there are (in the figure, A, 10 B, 9 C, 8 D, 77, the following figures, which are both symmetrical and central, are () a, ray b, line segment c, isosceles trapezoid d and parallelogram 8, as shown in the figure. In trapezoidal ABGHCD, AD//BC, E and F are the midpoint of AB and CD respectively, and AD=2. CH=EG+HF C, BGHC observing the right figure, the correct number of statements is x2 = y (2) y ≥ 0 (3) (4) x1+x2 = 0a, 2 B, 3 C, 1 D, 0 10. If a polynomial x2. Then the value of m is () a, 3 b, 6 c, 3 D, -3 1 1. In isosceles trapezoid, ABCD, AD//BC, BD=BC. E is a point on the extension line of AD, so there are () angles equal to ∠EDC. a，2 B，3 C，4 D，5 12。 The following denominators are () a, b, c, d, 2. Fill in the blanks (3 points for each small question, ***2 1 point) 1, and the area ratio of similar triangles is 2. Then its corresponding height ratio is _ _ _ _ 2, the finance minister of known □ABCD is 52cm, two diagonal lines AC and BD intersect at point O, and the difference between finance ministers of △BOC and △COD is 6cm, so the lengths of AB and BC are _ _ _ _ 3 respectively, and the side lengths of a known quadrilateral ABCD are A, B, C and D respectively. Then the quadrilateral is _ _ _ _ _ 4. If the sum of the simplest radicals is of the same kind, then a = _ _ _ _ _ _, b = _ _ _ _ 5, if x = _ _ _ _ _ _, y = _ _ _ _ 6, the number A is defined by point A on the number axis. 1) potted flowers, the total number of flowerpots with each pattern is S. ooooooooooooooooooooooooon = 2s = 3n = 3s = 6n = 4s = 9. According to this rule, when n= 1 1, s = _ _ _ 3. The position of the real number x on the number axis is shown in the figure. 3. If the three sides of a triangle are A, B and C, try to judge the shape of the triangle. 4. As shown in figure DE//BC, AB = 15, AC = 9, BD = 4. Ask AE. [5. Calculation 6. In a city, there are three expressways L 1, L2 and L3 crossing each other. Now it is planned to build a gas station on L3, so that its distance to L 1 and L2 is equal. Please draw the location of the gas station. You are required to draw with a ruler, but you should leave traces of drawing and write a conclusion. ) Fourth, 1 and 8 points for 2 questions, 7 points for 3 questions, and1* * 23 points. A maintenance team took a car to repair the line along the highway, and agreed that progress was positive and retreat was negative. It's a day's journey from a to work.