Mid-term examination questions of the seventh grade last semester \x0d\ 1. Multiple choice questions (3 points for each small question, * * 30 points) \x0d\ 1. The longest river in China is about kilometers long, which is expressed by scientific counting method as () \ x0d \ a.kmb.km \ x0d \ c.km.d.2. The following questions are correct: () \x0d\ a.b. \ x0d \ c.d. \ x0d \ 3. Yes () \ x0d \ A.b.c.d. \ x0d \ 4. The following from left to right are () \ x0d \ a.b. \ x0d \ c.d. \ x0d \ 5. A two-digit number, and the number on the unit is, and the number on the tenth digit is, that is to say, this two-digit number is () \ x0d \ a.b.c.d. \ x0d \ 6. The opposite number is () \ x0d \ a.b.c.d. \ x0d \ 7. The value of algebra is, and the value of is () \ x0d \ a.b.c.d. \ x0d \ 8. If so, the value of is () \ x0d \ a.b.c.d. \ x0d \ 9. The position of the known number,, on the number axis is shown in the figure, and the simplification result is () \ x0d \ a.b.c.d. \ x0d \ x0d \10. If,,, then the correct size relation is () \ x0d \ a.b. C. D. \x0d\ II. Fill in the blanks (3 points for each small question, ***30 points) \x0d\ 1 1. If the water level of the Yellow River is meters higher than the warning water level, it is recorded as meters, \ x0d \ so meters, which means meters higher than the warning water level. \ x0d \/kloc-the reciprocal of 0/2. Yes, the countdown is. 13. If, then = \ x0d \ 14。 Approximate logarithm by rounding, and keep three significant figures, the result is yes. \ x0d \ 15。 And are similar projects. \ x0d \ 16。 Draw a picture with matchsticks as shown below. The first picture needs matches. \ x0d \ \ x0d \ 17。 The monomial is a quintic monomial about,, so n = _ _ _ _ _ _ \ x0d \18. : The key sequence calculated by the calculator is: \x0d\\x0d\ and displayed as _ _ _ _ _ _. \ x0d \ \ x0d \ 19。 Add a polynomial, so this polynomial is _ _ _ _ _ _ _ _; \x0d\ 20。 Observe the following formulas: \x0d\, \x0d\, \x0d\, \ x0d \,? \x0d\ According to the law you found, please write the result of the following formula directly: \ x0d \ _ _ _ _ _ _ _ _ _ _ _ _ \x0d\ III。 Problem solving (***60 points) \ x0d \ 2 1. Calculate (16 points) \ x0d \ (1) (2) 0 \ x0d \ (3) (4) [(. X0d\(2) Simplify first and then evaluate, where. \ x0d \ x0d \ 23。 (8 points) Fill the following figures in the corresponding brackets: \x0d\ 1 1, 6.5,-8,0, 1. } \ x0d \ (2) Negative number set {? } \ x0d \ (3) Integer set {? } \ x0d \ (4) Positive integer set {? } \ x0d \ (5) negative integer set {? } \ x0d \ (6) Positive score set {? } \ x0d \ (7) Negative score set {? } \ x0d \ (8) Rational number set {? } \x0d\ 24。 (6 points) Medical research shows that height is hereditary, so the height of a child can be predicted according to the height of his parents. The calculation method is: \ x0d \ son height = (father height+mother height) × 1.08\x0d\ daughter height = (father height × 0.922) (expressed by algebraic expression) \x0d\(2) Xiaoming (male) father height1. Seek Xiaoming's adult height. \x0d\x0d\ 25。 (6 points) During the 7-day holiday of the "Eleventh" golden cycle, the daily tourist volume of Huangshan Scenic Area is as follows (positive number indicates that there are many people the day before, and negative number indicates that there are few people the day before) \ x0d \ Date 1, 2, 3, 4, 5, 6, 7 \ x0d \ number change (ten thousand people)+1. \x0d\(2) If there are at most 30,000 tourists a day, there will be 1 10,000 tourists on September 30th. \ x0d \ 26。 (8 points) Calculate according to the following procedure and write the answer in the form: \x0d\( 1) Fill in the form: \ x0d \ x0d \ Enter n \ x0d \ x0d \ 3 \ x0d \-\ x0d \ Output the answer1/. \x0d\(2) Please express the calculation program in the problem by algebra and simplify it. \x0d\ x0d \ 27。 (8 points) Miss Li gave the students a question: What is the value of \ x0d \? After the question was asked, Xiao Cong said, "The conditions given by the teacher are redundant." Xiao Ming said. Why? \x0d\ x0d \ reference answer: \ x0d \ i.1.a2.d3.b4.c5.d6.d7.b8.b9.a10.c. \ x0d \ ii.65438+. 12、2.5,—0.4。 13、 。 14、5.66× 106。 15、0。 16、2n+ 1 . 17.3; \x0d\ 18.2、0、4、5、40 . 19.； \ x0d \x0d\20. 1000。 Tip: Through observation, it is found that the rule in setting conditions is that the number on the right side of the equation is the complete square of a natural number and is equal to the square of a natural number on the left in the middle, so 1+2+3+? +99+ 100+99+? +3+2+ 1= 1002= 10000; \x0d\ III.2 1。 ( 1); (2) ; (3) ; (4) .\x0d\22。 ( 1) 。 (2)3.22。 \x0d\23。 ( 1) 1 1，6.5，， 1，(2)，-8，- 1，-3. 14 \ x0d \(3) 1 1，-8，，0， 1，- 1， (4) 1 1，\x0d\(5)-8，- 1 (6)6.5，\x0d\(7)，-3. 14 (8) 1 1，，6.5，-8，，0， 1，- 1，-3. 14 \ x0d \ 24。 (1) The height of the son after adulthood: 0.54 (m+n); Adult height of daughter: (0.623 m+ n). \x0d\ (2) is about1.82m. \ x0d \ 25. ( 1) 3, 7, 2.2, (2) 0.2.\ x0d \ 26。 Solution: The algebraic formula is:, and the simplified result is: 1 \ x0d \ 27. The original formula is =, and the consolidated result is 0.