volume one
First, multiple-choice questions (this big question * * 15 small questions, 3 points for each small question, 45 points for * * *)
1 b . 2d . 3 a . 4 b . 5d . 6 c . 7 a . 8 a . 9 c . 10 b . 1 b . 12 b . 13d . 14 b . 15 b
Volume II
2. Fill in the blanks (5 small questions in this big question, 5 points for each small question, 25 points for * * *)
16.
17 ... For example, the answer is not unique.
18.6 or 10 or 12.
19.83
20.6
Iii. Answering questions (this big question is * * 7 small questions, ***80 points)
2 1. solution: 0.2 points for solving inequality ①.
Solve inequality ② and get .4 points.
The solution sets of inequalities ① and ② are expressed on the number axis as follows:
6 points
The solution set of the original inequality group is 0.8 points.
22. Solution:
2 points
.4 points
When, .6 points
Original formula. 8 points
23. Prove that the ∵ quadrilateral is a parallelogram (known),
(The opposite sides of the parallelogram are parallel and equal)
(Two straight lines are parallel with equal internal angles) 2 points.
Average distribution, average distribution (known)
, (Angle bisector definition)
, .6 points
, (in the same triangle, equal angle and equal side)
8 points
, that is. 10 point
24. Proof: (Proof 1) connection. 1.
∵ is the diameter⊙ o,
.2 points
Yes, the midpoint,
.4 points
.6 points
Eight points.
. 10.
It is the tangent of point ⊙O. 12.
(Proof 2) Connection. 1 Score
∵ ,
.2 points
.4 points
OC = OE。
∴∠2=∠4.
∴∠ 1 = ∠ 3.6 points
Say it again,
.8 points
. 10 point
It is the tangent of point ⊙O. 12.
25.( 1)300; 3 points
(2)
9 points
(3) 0.32. 12 points
26. Solution: (1) The question means OK, 2 points.
Solve.
That is, the range of real numbers is .6 points.
(2)0.8 points.
If, that is, the solution is. 10.
∵ >, irrelevant, give up. 10.
If so, it is known by (1).
So when. 14 o'clock.
27. Solution: (1) The image is as shown in the figure; 3 points
(2)4 times; 6 points
(3) As shown in the figure, let the analytical formula of the straight line be,
∫ End of image,
8 points
. ① 10 score
Let the analytical formula of the straight line be, ∫ image pass,,
12 point
② 14
Solve the equations composed of ① and ②, and get
The last time we met, it was 100km from the ground, and the truck set off from the ground for 8 hours. 16 minutes.