Trong không gian với hệ tọa độ Oxyz, gọi α  là mặt phẳng chứa đường thẳng d : x − 2 1 = y − 3 1 = z 2  và vuông góc với mặt phẳng β : x + y − 2 z + 1 = 0 . Hỏi giao tuyến của α   v à   β  là:

A. (1;-2;0)

B. (2;3;3)

C. (5;6;8)

D. (0;1;3)

Đề 1:Phong tục tập quán gia đình em

Tet is a national and family festival. It is an occasion for every Vietnamese to have a good time while thinking about the last year and the next year. At Tet, spring fairs are organized, streets and public buildings are brightly decorated and almost all shops are crowded with people shopping for Tet. At home, every is tidied, special food is cooked,offerings of food, fresh water, flowers and betel are made on the family altar with burning joss- sticks scenting the air. First-footing is made when the lucky visitor comes and children are given lucky money wrapped in a red tiny envelope. Tet is also a time for peace and love. During Tet, children often behave well and friends, relatives and neighbors give each other best wishes for the new year.

Đề 3:Thích cuộc sông ở nông thôn

Bài số 1

I like living in the countryside because of some reasons. Environmentally speaking, it is a peaceful place. The air is fresh. The space is quiet. We can enjoy healthy natural conditions without worrying much about environmental pollution.

As for social security, the countryside is a safer place than a city. While urban security situation is always complicated with all kinds of crimes, rural areas are much more secure because most of countrymen are friendly and ready to help one another.

Moreover, rural life is also easier that in cities. People in cities are easy to get stressed because of pollution, job pressures, competitions, etc ... On the contrary, those bad things are very rare in the countryside. To sum up, except income matters, the countryside is a better residence than cities.

=> Bài dịch:

Tôi thích sống ở các vùng nông thôn vì một số lý do. Nói với môi trường, đó là một nơi yên bình. Không khí trong lành. Không gian yên tĩnh. Chúng tôi có thể thưởng thức các điều kiện tự nhiên lành mạnh mà không cần lo lắng nhiều về ô nhiễm môi trường.

Đối với an ninh xã hội, nông thôn là một nơi an toàn hơn so với một thành phố. Trong khi tình hình an ninh đô thị luôn luôn phức tạp với tất cả các loại tội phạm, các khu vực nông thôn là an toàn hơn nhiều vì hầu hết những người đồng hương thân thiện và sẵn sàng giúp đỡ lẫn nhau.

Hơn nữa, cuộc sống nông thôn cũng là dễ dàng hơn mà ở các thành phố. Người dân ở các thành phố rất dễ bị căng thẳng vì ô nhiễm, áp lực công việc, cuộc thi, vv ... Ngược lại, những điều xấu là rất hiếm gặp ở các vùng nông thôn. Tóm lại, trừ những vấn đề thu nhập, nông thôn là một nơi cư trú tốt hơn so với các thành phố. Bài số 2

The village has always been known to be a place of peace and quiet. The scattered houses among hundreds of plants and trees at once indicate the lack of activity in the village.

The workers in the village leave their homes early in the morning to work in the plantations or towns nearby. Some have their own plantations, and some make certain articles in their homes to sell them in the towns. A few of the villagers, including women, go out to catch fish in the streams and rivers found in the village. Though the people of the village do not usually earn much, yet they seem to be contented.

In the afternoon, most of the villagers are at home. Some of them take a nap after lunch; some work in their small gardens, and some visit the small shops in the village. In various parts of the village children may be seen playing the popular games of the village. Occasionally, a cyclist passes by.

Then, in the evening, the villagers meet one another. Some play cards and other types of games peculiar to the village. Some talk about the day's incidents in the village, and those whose minds go beyond the village discuss world events.

In almost every village there is a headman whose duty is to settle quarrels among the villagers and maintain peace in the village. Whenever there is a dispute, the villagers go to the headman who is held in such esteem that his word has the force or law. In this way the villagers have developed their own simple laws, and the crimes of cities are almost unknown to the people of the village.

During a festival, the whole village is alive with activities. Everyone is in a happy mood and plays his part to make the festival a success. This is the time for the men, women and children of the village to wear their best clothes and the village is full of colour. These simple ways of life in the village, however, must soon change. Progress in science and education has already begun to affect the outlook of the people in the village, and hundreds are leaving the village to seek their fortunes in the towns and cities.

Mình là bán yêu nên học én lịt không giỏi ! Mong bạn thông cảm !

Đề 2:Một câu chuyện:Nàng công chúa và hạt đậu

Once upon a time there was a prince who wanted to marry a princess; but she woul have to be a real princess. He travelled all over the world to find one, but nowhere could he get what he wanted. There were princessesenough, but it was difficult to find out whether they were real ones. There was always something about them that was not as it should be. So he came home again and was sad, for he would have liked very much to have a real princess.

One evening a terrible storm came on; there was thunder and lightning, and the rain poured down in torrents. Suddenly a knocking was heard at the city gate, and the old king went to open it.

It was a princess standing out there in front of the gate. But, good gracious! what a sight the rain and the wind had made her look. The water ran down from her hair and clothes; it ran down into the toes of her shoes and out again at the heels. And yet she said that she was a real princess.

“Well, we’ll soon find that out,” thought the old queen. But she said nothing, went into the bed-room, took all the bedding off the bedstead, and laid a pea on the bottom; then she took twenty mattresses and laid them on the pea, and then twenty eider-down beds on top of the mattresses.

On this the princess had to lie all night.

In the morning she was asked how she had slept.

“Oh, very badly!” said she. “I have scarcely closed my eyes all night. Heaven only knows what was in the bed, but I was lying on something hard, so that I am black and blue all over my body. It’s horrible!”

Now they knew that she was a real princess because she had felt the pea right through the twenty mattresses and the twenty eider-down beds. Nobody but a real princess could be as sensitive as that.

So the prince took her for his wife, for now he knew that he had a real princess; and the pea was put in the museum, where it may still be seen, if no one has stolen it.

There, that is a true story.