Beijing Daxing District junior high school Chinese, mathematics, English, physics and chemistry respectively use which version of the textbook I know that English is a new edition of Beijing Normal University. Do they use the same edition for three years in junior high school?

Mathematics, Chinese, English, physics and chemistry are using the course reform, and three years are

Tianjin high school Chinese, mathematics, English, physics, chemistry which books? Science students. Thank you

Chinese and English do not distinguish between arts and science
Chinese: compulsory 1, 2, 3, 4, 5, elective (appreciation of ancient Chinese poetry and prose), elective (appreciation of modern Chinese poetry and prose), elective (article writing and revision), elective (Application of language) in the experimental textbook of ordinary high school curriculum standard -- Chinese published by people's Education Press
Mathematics: People's education press "ordinary high school curriculum standard experimental textbook - Mathematics" (version a) compulsory 1, 4, 5, 3, 2, optional 2-1, 2-2, 2-3, 4-1 (geometry proof), 4-4 (coordinate system and parametric equation)
English: compulsory 1, 2, 3, 4, 5, optional 6, 7, 8, 9, 10, 11 (some schools only learn optional 8)
Physics: People's education press "ordinary high school curriculum standard experimental textbook - Physics" compulsory 1, 2, elective 3-1, 3-2 (only learn electromagnetic induction and alternating current two chapters), 3-4, 3-5
Biology: compulsory 1 (molecule and cell), compulsory 2 (heredity and evolution), compulsory 3 (steady state and environment) and optional 3 (modern biological science and technology topic) of the experimental textbook of curriculum standard for senior high school -- biology published by people's Education Press
Chemistry: compulsory 1, 2, elective 1 (Chemistry and life), elective 4 (Principles of chemical reaction) and elective 5 (Fundamentals of Organic Chemistry) of ordinary high school curriculum standard experimental textbook -- chemistry published by people's Education Press

Which books do you study in English? Compulsory is a must, but there are many elective courses, only some of which are heard and learned. Moreover, the choices of each school are different. What are the key points of each subject? What books do general schools tend to choose?

English: German: is the plural of German German or German or German?
Three_______ Fill in the blanks

The plural form of German is Germany, so choose Germany
In addition to Chinese and Japanese, Swiss is homomorphic
The plural form of German is Germany, because here German is not a compound word composed of German and man, so it cannot be changed into German
In other words, if a word is a compound word with man, its plural form should be - men, such as English, frechmen
Note: Walkman is not a compound word composed of walk and man, because it does not mean "walking man", so the plural is walkmans

I'll count the answers myself
1: The roller of a planter is a cylinder, the diameter and height of the bottom surface are 1m, and how many square meters can be sown by rolling 200 circles?
2: Dig a 9.42m3 cylindrical pool with 2m diameter. How deep should it be?
3: A cone-shaped beach has a perimeter of 6.28m at the bottom and a height of 90cm. If the sand weight per cubic meter is 1.8T, how many tons does the pile weigh
4: The bottom area of the cone is 90 square centimeters. What is the height of the cone
5: A cylindrical measuring cup with a diameter of 10cm is filled with water. When an iron ball is immersed in the water in the measuring cup, the height of water in the measuring cup rises from 15cm to 18cm. How many cubic centimeters is the volume of the iron ball?
6: There are two cylinders of the same height. The ratio of the bottom radius is 3:2. The volume of the first cylinder is 48 cubic centimeters. How many cubic centimeters less is the volume of the second cylinder than the first one?
7: The inner diameter of the water pipe is 2cm, and the speed of water flow in the pipe is 8cm per second. A student went to wash his hands and forgot to turn off the tap. How much water was wasted in 5 minutes?

You are doing AB! Yes, answer me, I have done, I can give you all the answers

Take any three numbers from 1, 3, 5, 7 and 9, and any two numbers from 0, 2, 4, 6 and 8 to form five digits without repetition. How many are there in total
Write liquidation method and answer, 3Q

1. If 0 is taken, then:
C(3,5)×C(1,4)×[4A(4,4)]=3840
2. If 0 is not taken, then:
C(3,5)×C(2,4)×A(5,5)=7200
A total of 7200 + 3840 = 11040

F (x) is an odd function whose domain is R. when x < 0, f (x) = x2-3x + 1, then f (x)=______ ．

Let x > 0, then when - x < 0 ∵ x < 0, f (x) = x2-3x + 1 ∵ f (- x) = (- x) 2-3 (- x) + 1 = x2 + 3x + 1 ∵ f (x) is an odd function with the domain R ∵ f (- x) = - f (x) = - f (- x) = - x2-3x-1 ∵ f (- 0) = - f (0) ∵ f (0) = 0, so the answer is: F (x) = x2 − 3x + 1

In triangle ABC, ∠ A: ∠ B: ∠ C = 1:1:2, a, B and C are opposite sides of ∠ a, ∠ B and ∠ C respectively, then ()
A. The square of B + the square of C = the square of A. the square of B. C = the square of 3B
C.3a's Square = 2 C's Square D.C's Square = 2B's Square
This is about the Pythagorean theorem, known right triangle ABC, right side AB is 5cm, BC is 12cm, find the height on the hypotenuse of the triangle
The hypotenuse ac * AC = AB * AB + BC * BC is substituted into the data solution to get AC = 13
Then, it is solved according to the triangle area
The height can be set as X:
0.5 * ac * x = 0.5 * AB * BC is substituted into the data to get x = 13 / 60 (CM)
5 * ac * x = 0.5 * AB * BC step 0. Or who has a better way?

In the first question, because ∠ A: B: C = 1:1:2, a = b = 45 ° C = 90 ° can be obtained
So this is an isosceles right triangle. C is a hypotenuse
Using Pythagorean theorem in right triangle: C & sup2; = A & sup2; + B & sup2;
Because angle a is equal to angle B, so a = B, so C & sup2; = 2B & sup2; choose D
Second question
Ac * AC = AB * AB + BC * BC, AC = 13
That's right
The principle of the second solution is that the triangle has a certain area
There are two ways to find the area of a right triangle
The first one is s = 0.5 * ac * x, the product of side length multiplied by corresponding height, and then multiplied by 0.5
In the second type, s = 0.5 * AB * BC, because it is a right triangle, one right edge is the corresponding height of the other right edge
Based on this principle, a right triangle can be regarded as half of a rectangle, and the calculation method of rectangle area is s = length * width. Therefore, triangle s = 0.5 * side length * corresponds to height
Do you understand?
There will not be contact me

What is the center of the triangle What is the nature of the center

This. Not all triangles have centers
There's only an equilateral triangle. So the center is all those hearts. What's the perpendicular, the center of gravity, the heart
So there are all the properties of the heart

For positive integers a, B, a △ B is equal to the sum of B consecutive positive integers starting from a, such as 2 △ 3 = 2 + 3 + 4 = 9, or 5 △ 4 = 5 + 6 + 7 + 8 = 26. If x △ 4 = 46, x =?

(2x+3)*2=46 x = 10;

Beijing Daxing District junior high school Chinese, mathematics, English, physics and chemistry respectively use which version of the textbook I know that English is a new edition of Beijing Normal University. Do they use the same edition for three years in junior high school?