subject
A, multiple-choice questions each small 3 points, ***24 points.
1, in the following numbers:-,,3. 14 159,,, 0. ,, 2. 12 122 1 12438.
a、3 B、4 C、5 D、6
2. In the figure below, through, we can get that.
3. There are two non-overlapping straight lines on the plane. If known, the positional relationship is
A, parallel to each other B, may or may not be parallel.
C, perpendicular to each other d, may or may not be perpendicular.
4. In the following groups, the groups with opposite numbers are
A, -2 and b, -2 and c, -2 and d, and
5. If the point is on the axis of the plane rectangular coordinate system, the coordinates of the point are
a，0，-2 B，0，-4 C，2，0 D，4，0
6. Given point 2, point 7 and axis, the coordinates of these points are
A, 5, 7 B, 2, 10 C, 2, 10 or 2, 4 D, 5, 7 or-1 7.
7. From the equation, we can get the formula expressed by.
A, B, C, D,
8. If the equation is a binary linear equation, the value of is
A, 1 B,-1 C, d, all real numbers.
2. Fill in the blanks with 3 points for each small question and 27 points for * * *.
The square root of 1 is _ _ _ _ _ _ _.
2. The positive integer solutions of the equation have _ _ _ _ _ _ _ groups.
3. As shown in the figure, a straight line, a straight line and a straight line intersect at a point sum respectively, and the vertical foot is a point, if, then = _ _ _ _ _ _ _
4. As shown in the figure, after a rectangular piece of paper is folded along the edge, the points D and C fall at the positions D' and C' respectively. If = 70, then = _ _ _ _ _.
5. As shown in the figure, the distance from point to point is _ _ _ _ _.
6. If the point in the plane rectangular coordinate system is known to be in the second quadrant, then the point is in _ _ _ _ _ _ _ _.
7. If a known point is located on the right side of the axis, 3 unit lengths off the axis and 4 unit lengths above the axis, the coordinate of the point is _ _ _ _ _ _ _ _ _ _.
8. If yes, then = _ _ _ _ _ _, = _ _ _ _ _.
9. Both parties solve the equations at the same time. If Party A has correctly solved the equation, Party B has copied it wrongly, and the solution is = _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _.
3. Answer 65438+ 0, 2, 3 points for each question, 8 points for each question, 3, 5, 7, 6 points for each question, 7 points for each question, and * * * 49 points.
1, 3 points to calculate the values of 2 and 3 points.
3,8 decomposition equation
4, 6 points as shown in the figure: AB∨DE∨CF is known, if ∠ ABC = 60, ∠ CDE = 140, find the degree of ∠BCD.
5 and 8 o'clock As shown in the figure, each small square in the grid paper is a square with a side length of 1 unit length, and the known points A- 1 and 1. Now point A is translated by 3 units to the left, and then translated by 4 units to get point B, then point B gets point C about axis symmetry, and finally point C gets point D about axis symmetry. ..
1 Make points A, B, C and D in the coordinate system.
2 connect ABCD in turn to find the area of quadrilateral ABCD.
At 6: 00 and 7: 00, a "Harmony" EMU on the high-speed rail, the first-class car and the second-class car * * 10, a * * * has 486 seats. Among them, each first-class car has 42 seats and each second-class car has 64 seats. How many cars are there in the first class and second class of the train?
7, 8 points as shown in the figure: two iron bars stand upright in a bucket, and the bottom of the bucket is horizontal. After adding water into the barrel, the length of one iron bar exposed to the water is the same as that of the other iron bar exposed to the water. The sum of the lengths of the two iron bars is 565,438+0 cm. How deep is the water in this bucket?
As shown in the figure, the straight line ∨8 and 6 points are added to the two points respectively, and the point is at the top.
1 Discuss the relationship between ∠ 1, ∠2 and ∠3 in the diagram and explain the reasons.
2 If the point P moves beyond the points A and B, please write the relationship between ∠ 1, ∠2 and ∠3 directly, and it is not necessary to explain the reason why the point sum and do not coincide.
Reference answer
A, multiple-choice questions each small 3 points, ***24 points.
1、B 2、B 3、A 4、A 5、C 6、D 7、C 8、B
2. Fill in the blanks with 3 points for each small question and 27 points for * * *.
1, 2, 2 3, 4, 5, 2.4 6, 17, 3,4 8, 2,0 9, 2,0, 1.
3. Answer 65438+ 0, 2, 3 points for each question, 8 points for each question, 3, 5, 7, 6 points for each question, 7 points for each question, and * * * 49 points.
5, 1A, b, c and d points1........................ 4 points.
6. Solution: Suppose the train has a first-class car and a second-class car ........................... 1 min.
A: This train has seven first-class cars and three second-class cars. ...............................................................................................................................................................
7. Solution: Let an iron bar have one centimeter and another iron bar have one centimeter ............................................................ 1 min.
Answer: The depth of the water in the bucket is18cm. .........................................................................................................................................................
8,1∠1+∠ 2 = ∠ 3 ..........................1min.
Pass P..................2 points for PQ.
∠1=∠ CPQ ............................... 3 points.
∠ 2 = ∠ DPQ ............................. 4 points.
∠ 1+∠2=∠3
2 If point P moves out of point A ∠ 2 = ∠1+∠ 3; ...................., five points.
If point P moves out of point B ∠1= ∠ 2+∠ 3, ........................ scores 6 points.