"Three-year simulated five-year senior high school entrance examination" is also acceptable.

Our brains are almost the same, and we can recite formulas. We also read the book of Grade Three in advance, and used the solution of Grade Three or High School in advance, which will make junior high school very simple. In fact, we can read the first few chapters and cohesion of high school.

1. If the real numbers x and y satisfy (x+y+2)(x+y- 1)=0, then the value of x+y is ().

A. 1 B.-2 C.2 or-1 d.2 or1

In order to estimate the number of fish in the lake, 50 fish were caught from the lake for marking and then put back into the lake. After a period of time, after the marked fish were completely mixed with the fish, 200 fish were caught for the second time, marked 10, and it was estimated that there were () fish in the lake.

Fold a rectangular piece of paper in half, and you can get a crease and fold it continuously. When folding, each crease is parallel to the last crease, and seven creases can be obtained after three consecutive operations. Then the number of creases that can be obtained by folding n times is ().

2. It is known that x has two square roots and x=3, so the value of x is ().

3. Use two congruent right-angled triangles to spell out the parallelogram as shown in Figure ①; ② Rectangular; ③ diamond shape; 4 squares; ⑤ isosceles triangle; 6 equilateral triangle, in which the figure that may not be spelled is ().

C.③④⑤ D.③④⑥

5. If the coordinate of the intersection of the straight line y=-x+a and the straight line y=x+b is (m, 8), then the value of a+b is ().

A.32 B.24 C. 16 D.8

10. The biology group of a school 1 1 person collected samples outside the school, among which 2 people collected 6 samples each, 4 people collected 3 samples each and 5 people collected 4 samples each, so this group collected samples on average ().

A.3 pieces B.4 pieces C.5 pieces D.6 pieces

Fill in the blanks (2 points for each small question, 20 points for * * *)

13. point P 1 (A- 1, 5) and point P2(2, b- 1) are axisymmetrical about x, then a+b = _ _ _ _ _.

14. The distance between point A (3, -2) and point B (0, 2) is _ _ _ _.

15. In the following series of figures spelled with matchsticks, the nth figure consists of n squares, which can be found by observation.

(1) The matching number of the fourth digit is _ _ _ _ _ _ _ _.

(2) The number of the nth graphic matchstick is _ _ _ _ _ _ _ _.

16. if the straight line y=kx-4, and when x=-6 and y=8, then k = _ _ _ _ _ _ If this straight line passes through the point (9, m), then m = _ _ _ _ _.

17. the straight line y=(k2+ 1)x+k, and y is _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

19. A group of boys in a class took part in the physical education test. The pull-up scores (units) are as follows: 6,9, 1 1, 13, 1 1, 7,10,8,65438. The median is _ _ _ _ _.

20. If the two bottoms of a right-angled trapezoid are 7 cm, 12 cm and the inclined waist is 13 cm, then the area of this trapezoid is equal to _ _ _ _ _.

So much typing first, the exam is coming, it's time to review. Remember "100%" or "three-year simulated five-year senior high school entrance examination"