1. Multiple choice questions (3 points for each question, * * * 45 points)
The arithmetic square root of 1 196 is ()
A. 14 B. 16 C. 14 D。
2. The irrational number is ()
A. Infinitely cyclic decimals B. Numbers with radical signs
C. All real numbers except finite decimals D. All real numbers except rational numbers
3. The following patterns are the symbols of several domestic banks, among which the axisymmetric pattern is ().
1 (B)2 (C)3 (D)4。
The square root of 4 is ()
A.2b.2c.4d. does not exist.
5. In the following categories, the correct one is ()
A.B.
C.D.
6. The top angle of an isosceles triangle is 80, so one of its bottom angles is ().
40 BC to 50 BC
7. The area of three squares is shown in the right figure (4), and the area of square A is ().
A.6 B. 36
C.64 D. 8
8. As shown in the figure, the right triangle among the following triangles is ()
9. Xiao Ming accelerated as soon as he left school, drove at a constant speed for a while, then slowed down and finally stopped. The following figure can roughly describe the changes of his time and speed in this process ().
A speed b speed c speed d speed
Time time time time time time time.
(A) (B) (C) (D)
10 is a rectangle with an area of160m2. The expression of the relationship between the length y meters and the width x meters is ().
A.y = 160 x b . y = C y = 160+x D y = 160-x
1 1. The picture on the right is a round barrel with a bottom diameter of 24cm and a height of 32cm, which can be accommodated in the barrel.
The longest stick is ()
A.20 cm wide and 50 cm high
C.40 cm deep 45 cm
12, and the right figure shows the relationship between vehicle speed (km/h) and time (min). The following statement is correct ().
1。
(1) The driving time of the car is 40 minutes;
(2)AB means that the car is driving at a constant speed;
(3) In the 30th minute, the vehicle speed is 90km/h;
(4) The 40th minute, the car stopped.
13. The following statement is wrong ()
A. Two triangles symmetrical about a straight line must be congruent; B. an axisymmetric figure has at least one axis of symmetry.
C. congruent triangles must be symmetrical about a straight line; An angle is a figure that is symmetrical about its bisector.
14. When two right-angled sides of a right triangle are expanded to twice the original at the same time, the hypotenuse is expanded to the original ().
A.2 B.3 C.4 D.5
15. It is known that two non-parallel line segments AB and A'B' are symmetrical about the straight line 1, and the straight line where AB and A'B' are located intersects with point P, and the following four conclusions are drawn: ① AB = A 'b'; ② Point P is on the straight line 1; ③ If a and A' are corresponding points, the straight line 1 vertically bisects the line segment aa'; (4) If both B and B‘' are corresponding points, then PB = PB', and the correct one is ().
A.①③④ B.③④ C.①② D.①②③④
The answer sheet of the first semester of the 2006 school year was given.
The title is12345678 91012131415.
answer
Fill in the blanks: (5 points for each small question, * * * 25 points)
1. Xiao Fang looked at the electronic clock opposite the mirror and the reading was 2: 35. Can you determine the exact time?
2. The square root of is,; The cube root of 0.2 16 is.
3. Every time the rabbit jumps, it is 1 meter. Jump straight 12 times before turning left. Then it jumps five times in a straight line and turns left. Finally, the straight jump 13 times just returned to the original position. So the angle of the white rabbit's first left turn is.
4. The temperature change on a certain day is shown in the figure. The temperature at 9 am is ____oC, which is the same as that at night. The highest temperature on this day is _ _ _ _ _, reaching _ _ _ _, and the lowest temperature reaches _____oC, at _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
5. As shown in the figure, in ABC, C=, AD divides BC to D, DE⊥AB to E, AB= 10cm, AC=6cm, then the circumference of BDE = _ _ _ _ _ _ _ _ cm.
Iii. Answer: (5 points for each small question, 30 points for * * *)
1. Compare the size of sum; 2. Simplify:
3. As shown in the figure, A and B are two reservoirs, both on the same side of A River. In order to facilitate the irrigation of crops, a pumping station should be built by the river to send the river to A and B. Ask where the station is built by the river to make the repaired river shortest, and try to determine this point in the figure (keep traces of drawing).
4. As shown in the figure, pull AB line and AC line at 5 meters from the ground on both sides of the pole to fix the pole. Life experience shows that when the distance between the anchor point B (or C) and the pole bottom point D is the length of one side, the pole is relatively stable. How long does it take to stabilize the pole? Try to answer with what you have learned. (accurate to 1 m)
5. Xiaoming drew a quadrilateral as shown in the figure, where AB=4, BC= 12, CD= 13, DA=3, ∠A=, can you find the area of quadrilateral ABCD?
Father told Xiaoming: "The farther away from the ground, the lower the temperature" and showed Xiaoming the following table.
Height from the ground (km) 0 1 2 3 4 5
Temperature (℃) 20 14 8 2
According to the above table, dad gave Xiaoming the following questions. You and Xiao Ming should answer together.
(1) Which two variables are reflected in the table above? Which is the independent variable? Which is the dependent variable?
(2) If H stands for height above the ground and T stands for temperature, how does T change with H?
(3) Do you know what the altitude temperature is 5 kilometers above the ground?
(4) Can you guess what the altitude temperature is 6 kilometers above the ground?
Answers to the first-grade mathematics examination questions in the mid-term exam of last semester in 2006 school year
1. Multiple choice questions (3 points for each question, * * * 45 points)
1. Answer 2. D3、C 4。 b5。 6.B. 7.B. 8。 D 9、C 10、B. 1 1。 C.
12、c 13、c 14、a 15、d。
Fill in the blanks: (5 points for each small question, * * * 25 points)
1、9∶25 2.,0.6; 3、900
4, 26oC, 2 1, 32℃, 15, 3 o'clock to 22oC, 10℃, 12, 3 o'clock to 15, 15 to 3 o'clock the next day.
5, 12 cm.
Iii. Answer: (5 points for each small question, 30 points for * * *)
1.< ; 2.2
3. Make point C where point A is symmetrical about line A, and connect BC to point P, then point P is the location of the pumping station.
4.2 meters.
5、36
6.( 1) Height and temperature. Height. Temperature.
(2) smaller
(3) ℃
(4)- 16℃