The final examination questions of the second volume of mathematics in the first day of junior high school of Jiangsu Education Press.
A, multiple-choice questions (this topic is entitled *** 10 small questions, 3 points for each small question, 30 points for each small question. Only one of the four options given in each small question meets the requirements of the topic, so fill in the correct answer in the corresponding position on the answer sheet)
1. The result of calculating 3 ~ 1 is ().
A. 3rd century BC-3
2. The following operation is incorrect ()
A.x3+x3=x6 B. x6？ x3=x3 C. x2？ x3=x5 D. (﹣x3)4=x 12
3. The solution set of inequality group can be expressed as () on the number axis.
A.B. C. D。
4. There are four kinds of logo patterns below, among which () is axisymmetric.
A.②③④ B. ①③④ C. ①②④ D. ①②③
5. Among the four sticks with the following length, two sticks with the length of 4cm and 9cm can be used to form a triangle, which is ().
A.4cm wide, 5cm high and 9cm deep13cm
The final result of 6.2x2-4x+2 factorization is ().
A.2x(x﹣2 2(x﹣ 1)2 2(x2﹣2x+ 1 2x﹣2)2
7. As shown in the figure, in Rt△ABC,? ACB=90？ DE is parallel to AB through point C, if? BCE=35？ And then what? The degree of a is ()
A.35? B. 45？ C. 55？ D. 65？
8. As shown in the figure, how to translate △DEF into △ABC ()?
A. Translate △DEF by 4 units to the left, and then by 2 units to the down.
B. Translate △DEF by 4 units to the right, and then by 2 units down.
C. Translate △DEF by 4 units to the right, and then by 2 units upward.
Translate △DEF by 4 units to the left, and then by 2 units up.
9. The following propositions:
(1) is complementary to the inner corner of the side;
② If n
3 right angles are equal;
Isoangle is the relative vertex angle.
Among them, the number of true propositions is ()
A. 1 B. 2 C. 3 D.4
10. If the sum of all integer solutions of the inequality group about x is 10, then the value range of m is ().
A. IV