The full mark of this volume is 120, and the examination time is 120 minutes.
First, multiple-choice questions: (This big question * * 10 small questions, 3 points for each small question, * * 30 points. )
1. Two sides of a given right triangle are 3 and 5 respectively, and the third side is ().
A, 4 B, 4 or 34 C, 16 or 34 D, 4 or
2. If the parallelogram rotates 90 around the diagonal intersection and can coincide with itself, the parallelogram is ().
A, rectangle b, diamond c, square d, uncertain
3, in the following formula, the correct is ()
A, B,
C,
4. If the lengths of four sides of a quadrilateral are A, B, C and D respectively, and if a +b x c +d =2(a c+b d), then this quadrilateral is
A, parallelogram b, diamond c, rectangle d, square
5. Given the sample X, X, X, the average value of X is 4, x +3, x +3, x +3, and the average value of x +3 is ().
a、7 B、5.75 C、3 D、4
6. The coordinate of point P relative to the X axis symmetry point P is (4,8), so the coordinate of point P relative to the origin symmetry point P is ().
a，(4，8) b，(4，8) C，(4，8) d，(4，8)
7. In quadrilateral ABCD, if A: B: C: D = 3: 3: 2: 4, then the quadrilateral is ().
A, arbitrary quadrilateral b, parallelogram
C, right-angled trapezoid D, isosceles trapezoid
8. If the solution of the equations satisfies the relationship of linear function y =-x+b, the value of b is ().
a，a 2 B， 1 C，a l D，3
9, the following four graphics, can't through the basic graphics translation is ().
10, a candle is 20 cm long, and it burns 5 cm per hour after being lit. The functional relationship between the residual height h (cm) and the combustion time t (h) is ().