1d 2c 3d 4a 5b 6c 7a 8a

Các công thức vật lý lớp 8 :)))))

With fast growth of civilization there is also an ever mounting need for energy. Energy may be in the form of fuels or electricity. Petrol is a liquid fuel which is used widely nowadays. But this kind of fuels is likely to be exhausted at the rate man is using it recently.

To meet the challenge, various methods have been suggested. One is to minimize the man’s demand in using the energy. Non-essential consumption should be minimized. During certain days of the year, people all over the world turn off the electricity for 1 hour to save the energy. Modern gadgets consuming energy should only be used when they are absolutely necessary.

Energy conservation is possible through modernization of plant and equipment. People should replace the obsolete equipment by the modern ones.

Energy can be saved on transport by the following methods. People should commute by the rail rather than by cars and vans. The transport must be improved with a view to sparing the energy. Cities must be planned in such a way that the commuting distance from this place to others is minimized.

In industry, many things could be done to reduce waste of energy or to economize energy. The machine maintenance needs to be tightened; heater must be utilized properly. When systems are streamlined, economy in fuel is obvious. Instead of using materials requiring higher energy, those which require lower energy should be used.

We hope man with his ever rising urge for existence will cope up with this urgent problem and find alternatives.

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This week I’m going to talk about the festival of Christmas in Britain. When you do your speaking exams, whether it’s IELTS or Cambridge exams, you are sometimes asked to describe a festival in your country and I think Christmas is probably the main festival really overall in Britain every year, so you can see my sample answer below. And also in the Audio Word Study you will find some useful phrases for talking with your friends, your neighbours and your colleagues over the Christmas and New Year periods. Below that you can also find out all the topics coming soon in our DailyStep Subscriber Audio lessons.

If you are new to DailyStep and you would like to be on our mailing list and also have 5 free lessons, please register. You can also subscribe if you would like to receive 5 Daily Lessons per week and if you would like to make some extra money recommending DailyStep to your friends, your colleagues and your students, then you can join our Affiliate Program.

1/I have seen a film on TV and it makes me a special impression impressed especially. And this film gets 11 Oscar’s award. Do you guess this film ?????^___^
The film talks about a love-story of two main characters on the fatal ship, those they (người mà)are JACK and ROSE. Jack is a countryman, opposite Rose is a girl of noble birth.Two people, two different classes but the love joins them together.

Next, the movie magic in the film also makes me so astonished and interested. A big ship with thousands of people on it , suddenly knock against a ice block, is broken and gradually sink into the ocean, with the screams of many people. This is my favorite part of the movie and is also the best scene in the film.
I like this film, not only the content of film , but also the performances, especially the soundtrack of the film. The title of this one is MY HEART WILL GO ON , a good song is played by singer : Celine Dion.

This movie is very well done and I have nothing bad to say about this movie. The title of this movie is TITANIC.

1. Our house was built two years ago
2.New clothes are often bought for our children on tet by us.

It was 2 years ago when I went for a picnic. My cousin planned the entire trip and we went to a place which was near the lake. He had visited the place about earlier and he liked it very much so he convinced me to go over there. The trip was just mind blowing from the beginning to the end.
We sat in the car at 9 am and it was a 4 hour drive from my home. We were a total of 5 people and we went to the place. As we reached the place we started cooking food as we were feeling very hungry. The place was looking so beautiful at night. There was a certain kind of reflection which the lake was putting on the land which was around it. I do not know what instigated me to do so but I swam in the lake. It was so cold over there and I even caught cold because of the cold weather.
I would say that overall the trip was very good. The main reason was that I was able to spend some quality time with my cousins and I was also able to live some time peacefully without any noise. I am even planning to trip like this in near future and this time I am the one convincing other people to go with me. I have been able to realize that in order to plan an enjoyable trip one does not have to spend so much money, it is just about finding the right place and right time.

2/ ENVIRONMENT
Nowadays, our natural environment is suffering more and more the terrible human impact. At the moment, there are a lot of environmental problems, like desforestation, the destruction of the ozone layer, acid rain, the greenhouse effect, pollution in the air with traffic humes, and harmful chemicals which are released into the atmosphere, pollution in the rivers and oceans with illegal effluents, sewage spills, industrial waste, drinking water is being contamined due to river pollution…. (and so on)….

All this take parts of a terrible situation and involves awful drawbacks in our planet. The destruction of the rainforest carries many animals are wiped out, fish supplies are depleted through overfishing, pollution is very harmful for us, besides, there are methods of electricity generation (which emit greenhouse gases), and contribute to global warming.

Our governments have to improve their natural measures. It is important to support alternative source of power, like solar stations, wind power… These one should be easy to live and work with, safe, practical, cheap and clean. On top of that, they are higly productive and friendly with the planet. Besides, our goverments should have stricker laws and hard punishments for illegal hunting, encourage countries to control the number of trees are cut down, reduce gases emitted from factories (and so on)…

On the other hand, we all have to be aware about this problem, and contribute to conserve our planet, like: switch off the lights, ride a bicycle, insulate our houses, use public transport, use less petrol and electricity, save on water, recycle our rubbish ….. In this way, we all can contribute to conservate our environment and wildlife.

Our environment affects all of us. We share the same planet. We all have to be aware of the necessity of improve our natural world. The environmental organizations play an important role, but we all can do a little effort in being much more ecological.

(*Nota: El tema de “Environment” es un poco lioso. No hace falta estudiarse conceptos muy específicos ni ser un especialista en la materia. Sólo llevar las ideas claras y además que esas ideas sean muy sencillas. No hace falta entrar en mucha materia).

5/ Learning is often considered to be a normal part of working and personal life. Both learning for achieving a job as well as for achieving knowledge should not be neglected. Online environment is changing continuously and it represents a great opportunity for learning. It is very important to discover how to learn using all available communicatio

Nowadays, online learning turns out to be more and more practiced. Many traditional universities started to share their courses online for free. It represents an easy and comfortable method to achieve knowledge in almost every field, from law and accounting, to human sciences, such as psychology and sociology or history. Online learning is a great alternative to traditional universities, especially for people who can’t afford the time and money to take real courses.

Although many people still consider traditional universities as the best way to achieve knowledge and get a diploma, online learning proves to be a great alternative. Students have the chance to study in their own time and especially for free. It represents a great way to study many fields and to boost the level of self-motivation. Online learning is so effective because students can finish their homework quickly, and there is more time left for hobbies or for finding a job.

An access to all resources of a traditional course helps participants learn wherever they are, leaving them the freedom to choose the time for study. With basically an Internet connection, a person can attend different courses. Among the advantages of online learning there are the responsibility and self-discipline of students.

Disadvantages of Online Learning

Only in a small group a person can develop properly. At school, students learn how to make friends, be patient, get rid of disappointment, and especially to compete. Competition between colleagues can be very stimulating and students will only benefit from it. Online learning cannot offer human interaction.

Another disadvantage refers to the fact that online courses cannot cope with thousands of students that try to join discussions. Also, online learning can be difficult, if it is meant for disciplines that involve practice.

In conclusion, online learning should be seen as a complement and extension of classical forms of learning. Not even the best online course can fully replace the personal contact with a teacher, or the human relationships that develop in a group. So, traditional classes shouldn’t be replaced with online learning.

n channels and choosing the ones that best suit a person’s style of filtering the information.

1.d 2.a 3.b 4.d 5.b 6.c 7.a 8.b 9.b 10.d 11.a 12.c 13.c 14.a 15.a 16.b 17.c 18.a 19.c 20.d

Cho tam giác ABC vuông tại A,biết AB=9cm và AC =12cm.Tia phân giác của góc BAC cắt cạnh BC tại điểm D.Từ D kẻ đường thẳng vuông góc với AC/đường thẳng này cắt AC tại E

a)Chứng minh rằng tam giác CED và tam giác CAB đồng dạng

b)Tính CD/DE (CD trên DE)

c)Tính diện tích tam giác ABD