mathematics
First, multiple-choice questions (3 points for each small question, ***24 points)
1~8.BCCDAADC
Fill in the blanks (3 points for each small question, 24 points for * * *)
9.2 10. (or)11.12.6013.3
14.1200015. (or) 16.
Third, solve the problem (6 points for each small question, *** 18 points)
17. There are two situations: 2 points.
Note: 2 points for each figure.
18. Choose one: 4 points.
When: = 5: 2, the original formula = .6 points.
Option 2: 4 points
When: = 5: 2, the original formula = .6 points.
Option 3: 4 points
When: = 5: 2, the original formula = .6 points.
Note: Write only one kind.
19.( 1)
.
Yes,
; 3 points
(2) connection. In the trapezoid,,,
In the quadrilateral,
The quadrilateral is a parallelogram,
, which is an isosceles triangle. Six points.
Four, application problems (8 points for each small question, ***32 points)
20.( 1) Suppose, on the image, that is, where; 4 points
(2) The answer is not unique. For example, Xiao Ming's family goes to school at high speed every day after school, so the time it takes Xiao Ming to get from home to school is .8 minutes.
2 1.( 1) (one hundred million yuan) = (yuan); 2 points
(2) ; 4 points
(3) ; 6 points
(4) The answer is not unique. For example, the central government attaches great importance to rural livelihood projects such as farmland water conservancy. Eight points.
22. In China,
, 4 points
A quadrilateral is a parallelogram.
.
In,,,,
Seven points.
Increased distance =
(m) .8 points
23.( 1) kinds of lanterns and lanterns are necessary. According to the meaning of the question:
4 points
6 points for the solution
(2) 120×40+80×60=9600 (yuan) .8 points.
Verb (abbreviation of verb) reading comprehension question (10 mark)
24.( 1), 2 points.
; 2 points
(2) Original formula =
7 points
= 9 points
=. 10 point
Six, comprehensive questions (12 points)
25.( 1) when，； When. ; 2 points
(2) , ; 4 points
(3) (1) When the point is easy to know, the coordinates of the point are,
The coordinates of these points satisfy that,
Similarly, 6 points
therefore
; 8 points
(2) When,
The two solutions are not suitable for the topic, so I give up; 10 point
When, when, when,
To sum up, when it is still, it is the area of point. 12.