His favorite classes are Chinese and English translation

His favorite classes are Chinese and English translation

His favourite subjects are English and Chinese.
He loves English and Chinese best.
thank you very much!

English translation
Big () if ()
His foot was hurt and he couldn't walk to school
Swimming is more difficult than rowing
You'll feel good

Great wisdom is like a fool
His foot are hurt.He can't go to school on foot.

English translation
① The best thing is that I can meet you, my dear classmates
——Class five, grade one, senior high school
② My youth, my class five
——Class five, grade one, senior high school
③ About our memory of a year, bright and sad
——Class five, grade one, senior high school
④ One flower, one world, one leaf, one floating life
⑤ Warm, beautiful, sad, those shining memories in the water light

The best thing I have ever experienced is to meet you,my dear classmates.My youth,my Class 5.The memory about our year is both brilliant and sorrowful.To see the world in a flower,and a bodhi i n a le...

Simplification: 1 / X (x + 1) + 1 / (x + 1) (x + 2) + 1 / (x + 2) (x + 3) +. + 1 / (x + 2007) (x + 2008)
And find the value when x = 2 is an algebraic expression

The original formula = 1 / X-1 / (x + 1) + 1 / (x + 1) - 1 / (x + 2) + 1 / (x + 2) - -1/（x+2007）+1/（x+2007）-1/（x+2008）=1/x-1/（x+2008）=2008/[x(x+2008)]
When x = 2, the original formula = 2008 / (2 * 2010) = 502 / 1005
1/（1*2）+1/（2*3）+1/（3*4）+.+1/（10*11）=1-1/2+1/2-1/3+1/3-1/4+.+1/10-1/11=10/11
This is a more important formula!
1/（1*2）+1/（2*3）+1/（3*4）+.+1/｛n*（n-1）｝=（n-1）/n
Similarly, 1 / (1 * 3) + 1 / (3 * 5) + 1 / (5 * 7) +. + 1 / [n (n-2)] = 1 / 2 {1-1 / 3 + 1 / 3-1 / 5 +. + 1 / (n-2) - 1 / N = (n-1) / (2n)
See the law? How much is the difference between the two numbers of denominator
For example, 1 / (1 * 5) + 1 / (5 * 9) = 1 / 4 (1-1 / 5 + 1 / 5-1 / 9) = 2 / 9

Given that vectors a and B satisfy a = 1, B = 1. Ka + B = √ 3 a-kb (k > 0), find (1) express a * B with K and find the maximum angle between a and B (2) if a ‖ B finds the value of real number K

Ka + B = √ 3 a-kb, square of both:
k^2a^2+2kab+b^2=3(a^2-2kab+k^2b^2)
k^2+2kab+1=3(1-2kab+k^2)
ab=(k^2+1)/4k;
ab=|a||b|cosx;
So cosx = (k ^ 2 + 1) / 4K;
(2):a∥b==>cosx=1;
(k^2+1)/4k=1
k^2+1=4k
(k-2)^2=3;
K = 2 + √ 3 or K = 2 - √ 3

As shown in the figure, in the triangle ABC, BD: DC = 3:4, AE: CE = 5:6, find AF: FB

According to the same height triangle area ratio equal to the bottom ratio
△ABD:△ADC=BD:DC=3:4
△OBD:△ODC=BD:DC=3:4
The results show that △ oba: △ OCA = BD: DC = 3:4
Similarly, △ OBC: △ oba = Ce: EA = 6:5
The results show that △ OCA: △ OBC = (4 / 3): (6 / 5) = 10:9
That is AF: FB = 10:9

Finding the minimum value of function y = 3x ^ 2 + (12 / x ^ 2 + 1)

Let a = x & # 178; + 1
x²=a-1
And a > = 1
So y = 3 (A-1) + 12 / A
=3a+12/a-3
3A + 12 / a when a > = √ (12 / 3) = 2
0

Space vector 0-2-1
What is the vector perpendicular to it?

0 1 -2
0 -1 2

As shown in the figure, ∠ a = 10 °, ABC = 90 °, ACB = DCE, ADC = EDF, CED = FEG. Then the degree of ∠ f is ()
A. 30°B. 40°C. 50°D. 60°

Make up an application problem so that the unknowns satisfy the equations x + y = 200,5% x + 45% y = 70
Of course, you can change the data in the above equation according to the actual background, but don't change the form of the equation

There are 200 workers in the two workshops. The sum of 5% of the workers in workshop a and 45% of the workers in workshop B is 70. How many workers are there in each workshop?