20 12 Shenyang senior high school entrance examination mathematics examination questions

* Test scores 150, test time 120 minutes.

Reference formula: The vertex of parabola is (,), and the symmetry axis is a straight line.

1. Multiple choice questions (Only one of the alternative answers to the following questions is correct. 3 points for each small question, ***24 points)

1. Which of the following numbers is less than 0?

A.-3 B. 1 C.3 D

2. The figure on the left is a geometric figure composed of four identical cubes. The left view of this geometry is

3. The opening of Shenyang Metro Line 2 is convenient for citizens to travel. 2012 65438+1During the 30 days from October 9 to February 7, the cumulative passenger flow reached about 3.04 million, which was expressed by scientific notation as follows

a . 3.04× 105 b . 3.04× 106 c . 30.4× 105d . 0.304× 107

4. The result of calculating (2a) 3 A2 is

A.2a5 B.2a6 C.8a5 D.8a6

5. In the plane rectangular coordinate system, the coordinates of the point P (- 1, 2) about the symmetrical point of the X axis are as follows.

A.(- 1，-2 ) B.( 1，-2 ) C.(2，- 1)d .(2， 1)

6. The Meteorological Observatory predicts that "the probability of falling into the water in this city tomorrow is 30%", and the following statement is correct.

There will be 30% precipitation in this city tomorrow. There will be 30% precipitation in this city tomorrow.

C.it may rain in this city tomorrow. It will certainly not rain in this city tomorrow.

7. Image transmission of function y=-x+2.

A. Quadrants 1, 2 and 3 b. Quadrants 1, 2 and 4 c. Quadrants 1, 3 and 4 d. Quadrants 2, 3 and 4.

8. As shown in the figure, in the square ABCD, diagonal lines AC and BD intersect at point O, so the isosceles right triangle in the figure is as follows.

A.4 B.6 C.8 D. 10