Swan spreads its wings, wishing you to fly in the sky of Wan Li, and Ling will live up to what you have learned; To be the first, I wish you a smooth final exam of eighth grade mathematics and a happy harvest! Next, I will share with you some final examination papers of the second volume of mathematics in the second day of junior high school of Jiangsu Education Edition. Come and have a look with me.

Su teaches printing plate second day mathematics second volume final examination questions.

A, multiple-choice questions (this big topic * * a total of 10 small questions, each small question 3 points, * * * 30 points. Only one of the four options given in each question is correct. Please put the alphabetic code before the correct option in brackets after the question. )

1. In the following figures, the one that is both central and axial symmetric is ().

A.B. C. D。

2. Among the following quadratic roots, the simplest quadratic root is ().

A.B. C. D。

3. In the following survey, the census is applicable to ().

A. Investigation on mental health status of middle school students in China

B. investigate the height of your classmates.

C. Food quality survey in our city

D. Wuxi TV Station's "First Look" ratings survey

4. The following events are random events ()

A. Buy welfare lottery tickets and win the first prize

B, heating water to 65438+/-000℃ at standard atmospheric pressure, and boiling.

C the sum of the internal angles of any triangle is 180?

D. Touch out the red ball in a bag containing only white balls and black balls.

5. As shown in the figure, if the area of rectangle ABOC is, and the image of inverse proportional function y= passes through point A, then the value of k is ().

A.B.﹣ C.2 D.﹣2

6. Among the following properties, rectangle, diamond and square all have ().

A. the diagonals are equal. Diagonal lines are perpendicular to each other

C. Diagonal bisection A set of diagonal lines D. Diagonal lines are bisected with each other.

7. The following formula is correct ()

A.= 1 B. =

C.=x+y D. =

8. If the solution of the fractional equation X = 1 is positive, the value range of the letter a is ().

Alcoholics Association. ﹣ 1﹣ 1 C.a？ ﹣ 1 d . a & lt； ﹣ 1

9. As shown, in? In ABCD, point E is the midpoint of AB, and f is any point on BC. Fold △BEF along the straight line EF, and the point corresponding to point B is B? Fall on the diagonal AC and use? FEB must have equal angles (excluding? February) Yes ()

A.2 B.3 C.4 D.5

10. The known points (a- 1, y 1) and (a+ 1, y2) are in the inverse proportional function y =(k >；; 0), if y 1

A.a & gt 1 b . a & lt； ﹣ 1

C.﹣ 1