English translation (1)Teaching high school students in a poor mountain village in Gansu Province may not sound like fun to you.However , it changed the life of YangLei from Beijing.The Peking University graduate first went there as a volunteer on a one-year program.The program was started by the Ministry of Education and the Chinese Young Pioneers.Every year they send 100 volunteers to teach in China's rural areas. Life in the mountains was a new experience for YangLei.Her village was 2,000 meters above sea level,and at first the thin air made her feel sick.The food was very simple-teachers ate porridge three times a day.Fortunately ,YangLei's mother agreed with her daughter's decision.She said that both she and her husband thought this was a good idea.Young people today need to experience different things,"she said. Most of the pupils live in school dormitories.They work very hard.They get up at 5 am and read books until 11 pm.They love having the volunteer teachers there."There is no difference between you and them,"says YangLei."They say that we are like big brothers or sisters to them,and they feel lucky." Some of the students may not be able to go to senior high school or collage.Families are poor and there often isn't money for education."I can't do angthing about that,"says YangLei,"but I can open up my students' eyes to the outside world and give them a good star in life".She said she likes being a good influence in the children's lives. YangLei enjoyed her time as a volunteer very much.When her year was over,she said that she would return to the area after finishing her studies.She now works as a math teacher at a high school in the city of PingLiang,Gansu Province. (2)A generation gap has become a serious problem.I read a report about it in the newspaper.Some children have killed themselves after quarrels with parents.I think this is because they don't have a good talk with each other.Parents now spend more time in the office.So they don't have much time to stay with their children.As time passes, they both feel that they don't have the same topics to talk about.I want to tell parents to be more with your children,get to know them and understand them.As for children,show your thoughts.In this way,you can habe a better understanding of each other.

(1) It may be boring for you to teach in a middle school in poor mountainous areas of Gansu Province. However, it has changed the life of Yang Lei from Beijing. This graduate of Peking University first chose to go there as a volunteer for a one-year plan. This project is launched by the Ministry of education and the Chinese youth vanguard. Every year, they send 100 volunteers to teach in mountainous areas
For Yang Lei, life in the mountains is a new journey. Her mountain village is 2000 meters above sea level, so the thin air makes her feel very uncomfortable. The food there is very simple - teachers eat porridge three times a day, Yang Lei's mother agreed with her decision. She said she and her husband thought it was a good idea. "Young people nowadays need to experience different things," she said
Most of the students live in the dormitory. They study hard. They get up at 5 o'clock every day and study until 11 o'clock in the evening. They love the teachers there. "You are no different from them," Yang Lei said. "They say we are just like their big brother and sister. They feel very lucky."
Some students may not be able to go to high school or university, mostly because their families are poor and they can't afford the tuition. "Although there's nothing I can do about it," Yang Lei said, "I can help my students broaden their horizons and give them the stars in their lives." she said she hopes to play a good role in those children's lives
Yang Lei likes her volunteer life very much. When her teaching time is coming to an end, she said that she will return to this place after she finishes her studies. Now, she is teaching in a middle school in Pingliang City, Gansu Province
(2) Generation gap has become a serious problem. I read an article about it in the newspaper. Some children commit suicide after quarreling with their parents. I think it's because they don't establish good communication. Parents are busy with work now, so they don't have enough time to stay with their children, I want to tell parents that you should spend more time with your children to get to know them. As children, tell your thoughts to your parents. In this way, you can get to know each other better

The least common multiple of short division 10,12,18

2 L10 12 18
3 L 5 6 9
5 2 3
Least common multiple = 2 * 3 * 5 * 2 * 3 = 180

Solution ratio: X is equal to 0.5

x: 2 and 1 / 3 = 0.5
X = 2 and 1 / 3 × 1 / 2
X = 1 and 1 / 6

The following statement is wrong
A. All rational numbers can be represented by points on the number axis
B. The origin on the number axis represents 0
c. On the number axis, the distance between the point representing - 3 and the point representing + 1 is 2
D. The point on the number axis, which represents minus 13 / 4, is 13 / 4 units to the left of the origin
2. If | m | + | n | = 0, then the relation between M and N is ()
A. The reciprocal B.M. is greater than N.C. the reciprocal B.M. is opposite to N.C. and not 0.d. is 0

1,C 2,D

Uncle Zhang has four times as many chickens as ducks. It is known that there are 48 more chickens than ducks. How many chickens and ducks are there?

If there are x ducks, there are 4x chickens
4x-x=48
x=16
That is: 16 ducks, 4 × 16 = 64 chickens

Given the function f (x) = ax + 3 / X-1, if (2,7) is a point on the f ^ - 1 (x) image, find the range of y = f (x)

(2,7) is f ^ - 1 (x), that is, f ^ - 1 (2) = 7, so f (7) = 2, so 2 = (7a + 3) / (7-1) a = 9 / 7F (x) = (9x / 7 + 3) / (x-1) = (9x / 7-9 / 7 + 30 / 7) / (x-1) = (9x / 7-9 / 7) / (x-1) + (30 / 7) / (x-1) = 9 / 7 + (30 / 7) / (x-1) (30 / 7) / (x-1) ≠ 0, so f (x) ≠ 9 / 7 (- infinite, 9 / 7) ∪ (9 / 7

Two classes of a school walk to the outskirts to collect biological specimens. Class 5 of grade 1 starts at a speed of 4km / h. one hour later, class 6 of grade 1 starts at a speed of 6km / h. The school sends a liaison officer to ride a bike and start with class 6 of grade 1 at the same time, with a speed of 12km / h
Please design two different problems, and use the knowledge of equation to solve the problem

Q: when will class 6 catch up with class 5
A: it takes x hours to catch up (write more about it yourself)
4（X+1）=6X
4X+4=6X
-2X=-4
X=2
Similarly, when will the liaison person catch up
4（X+1）=12X
The solution is x = 1

Finding the general term formula of sequence 159

4n-3

Nanometre is a unit of length. One nanometre is equal to one billionth of a meter (one nanometre = 0.000000001 meters)
Nanometer is a unit of length. One nanometer is equal to one billionth of a meter (one nanometer = 0.000000001 meters), which is expressed as 2 / 5 nanometer by scientific counting method=___ rice

4*10^(-10)

The formula of linear equation with one variable
If a = B, then a ± C
If a = B, then AC=
If a = B (C ≠ 0), then a / C=
I'm self-taught. I don't have it in the software. It's in this book

If a = B, then AC = (BC)
If a = B (C ≠ 0), then a / C = (B / C)