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a - 16 ; 24 và a - 19 ; 27
suy ra a - 16 + 24 ; 24 và a - 19 + 27 ; 27
suy ra a + 8 ; 24 và 27
suy ra a + 8 thuộc BC (24,27)
BCNN(24,27) = 216
suy ra a + 8 thuộc B(216)
suy ra a + 8 = 216K ( K thuộc N)
suy ra a = 216K - 8
( ; là chia hết)
Trong thì hiện tại hoàn thành
VD :Has Linh called yet?
#Hok Tốt#
PHÓ TỪ
1. tuy thế, tuy vậy, nhưng mà, mà, song.
2. còn, hãy còn, còn nữa.
3. bây giờ, lúc này.
4. dù sao, dù thế nào.
5. (từ Mỹ,nghĩa Mỹ) vả lại, hơn nữa.
LIÊN TỪ
1. nhưng mà, song, ấy vậy mà, tuy thế, tuy nhiên.
ex;em có bn gái chưa?do you have a girlfriend/boyfriend?
not yest:là ko hoặc yes là có
+)you have learnt French since last year.
-)you haven't learnt French since last year.
?)Have you learnt French since last year?
Dalat is being the flower city. There have many flowers and the weather is cool. Dalat is famous for many beauty spot and fog. When you visit to Dalat you will feel comfortable.
You should get up early at 5.00am that can go for a walk along Xuan Huong lake, and enjoy fresh air.
You can go to the market buy some special food such as strawberry, confectionery, atiso, tea, coffee, souvenir or go shopping.
If you are interested in sightseeing you can visit to valley of love, Mong Mo hill, Tuyen Lam lake, Than tho lake, Datanla fallwater... etc
At night, you can go drink coffee in center of city. On night saturday and sunday, you can come Hoa Binh street where you can enjoy the foods in night market bean milks, egg ricepaper, arca and baked snail or buy something about dalat.
Dalat is being the flower city. There have many flowers and the weather is cool. Dalat is famous for many beauty spot and fog. When you visit to Dalat you will feel comfortable.
You should get up early at 5.00am that can go for a walk along Xuan Huong lake, and enjoy fresh air.
You can go to the market buy some special food such as strawberry, confectionery, atiso, tea, coffee, souvenir or go shopping.
If you are interested in sightseeing you can visit to valley of love, Mong Mo hill, Tuyen Lam lake, Than tho lake, Datanla fallwater... etc
At night, you can go drink coffee in center of city. On night saturday and sunday, you can come Hoa Binh street where you can enjoy the foods in night market bean milks, egg ricepaper, arca and baked snail or buy something about Dalat
Dear Oanh,
Thank you very much for your letter which arrived a few days ago. It was lovely to hear from you. I am sorry, I haven't written for you such a long time because I studied hard to pass the final exam. However, I had a great weekend more than every when I went to live concerts last night with my friends. Now, I am writing to tell you how the wonderful concert is.
It is the beautiful concert I have ever taken part in with many people and the miracle of sound of piano. As you know, my pianist is Yiruma and in last concert I couldn't believe that he appeared in my eyes and gave me a big hug after his performance. I also listen a soothing music which is played by him and other professional musicians. Only when I heard his song from the stage I feel anythings around me seem to disappear and I can fly with many stars on the sky to forget all my fears which I suffered before. That is amazing.
Let's come back to my live concert. It is so cool and until now I can't forget my feeling about it. Do you often to go live concerts? What kind of music do you like listening to? Who is your favorite singer?
I am glad if you tell me about it in the next letter.
I look forward to your reply.
Your sincerely,
Last summer, I went to Cua lo with my family. We went there by car, it is very far from my house, it is about 400 km, so we were very tired, but at one we felt better when we saw the sea.
Cua lo beach is really interesting, the beach is very large, flat, and it has a lot of sand. Waves are very strong, you will be very excited when you play with it. There are a lot of beauty spots, and good seafood there
We stayed in Binh Minh hotel. It was a very nice and comfortable hotel, it’s also rather near the sea.
The weather was hot and sunny all day. The sea was cool and clear, because it was very windy in the afternoon. We went swimming twice a day. My children was excited about it. The food was extremely delicious but not very expensive.
We took a lot of Photograps of the sea, bought a lot of seafood especially octopus and some sea present for our relatives
After a week in Cua lo beach we felt happy and stronger.
We hope to go there again.
Summer vacations are the best time to relax and enjoy with family and friends, it’s the time I eagerly waited for every year. This year’s summer vacation is so special to me because it was the first time I’ve been on a trip with my colleagues. We had a wonderful time in Vung Tau – the city which has most beatiful beaches in Vietnam.
We stayed there for 2 days at a small but convenient hostel. First day, we got up early to see the sunrise on the beach. It’s the most gorgeous thing I’ve ever seen. Then we swam and lay down on the sand to enjoy beautiful sunlight and the clear blue sky. We also enjoyed delicious seafood and drank fresh coconuts.
The next day, it took us about 30 minutes to hike up the Small Mountain to visit the Lighthouse. But it was really worth the try! The lighthouse affords a panoramic magnificent view of the whole of Vung Tau and is a really interesting site. On top of Small Mountain, there is the enormous 28m figure of Jesus gazing across the East Sea. This is the largest sculpture in the Southern Vietnam. The two shoulders of the figure are balconies, each able to accommodate up to six people, which offer a splendid view of the surrounding landscape.
The weather during the time we stayed was really good and the local people were friendly. We took many photographs to save our memorable vacation and bought a lot of souvenirs, too. I just had so many good memories of that whole trip. Everything was great, but what made the trip even greater was the fact that I was able to bulid a stronger relationships with my colleagues.
Hi Milos
Hue is a great city. It's sunny all the time. The food is cheap and delicious. The people here are friendly and hospitable. The hotel where we're staying is small but comfortable. Yesterday we visited the historic monuments. Tomorrow we're go on a trip along the Huong river.
You must visit the city someday. You'll live it. Bye for now!
See you soon
Khoa
1 - c: If you cross a channel or a river, which means do you choose? => c. a ferry
(Nếu qua kênh, sông em chọn phương tiện nào? => c. phà)
2 - a: If you travel between hills and mountains, which means do you choose? => a. cable car
(Nếu đi giữa đồi núi, bạn chọn phương tiện nào? => a. cáp treo)
3 - c: Trolleybuses and trams cannot move without electricity.
(Xe buýt 2 tầng, xe điện không thể di chuyển nếu không có điện.)
4 - b: You cannot see a subway train on a street.
(Bạn không thể nhìn thấy tàu điện ngầm trên đường phố.)
5 - b: A plane can travel between continents.
(Một chiếc máy bay có thể đi giữa các lục địa.)
6 - b: A boat can travel in a small river.
(Một chiếc thuyền đi được trên sông nhỏ.)
7 - b: The first subway system in the world is The London Underground.
(Hệ thống tàu điện ngầm đầu tiên trên thế giới là The London Underground.)
8 - b: A trolleybus travels on streets while a tram travels on railways.
(Xe điện chạy trên đường còn xe điện chạy trên đường ray.)
gọi số dã cho là A, theo đề bài ta có:
A = 7.a + 3 = 17.b + 12 = 23.c + 7
mặt khác: A + 39 = 7.a + 3 + 39 = 17.b + 12 + 39 = 23.c + 7 + 39
= 7.(a + 6) = 17.(b + 3) = 23.(c + 2)
như vậy A+39 đồng thời chia hết cho 7,17 và 23.
nhưng 7,17 và 23 đồng thời là 3 số nguyên tố cùng nhau nên : (A + 39) 7.17.23 hay (A+39) 2737
Suy ra A+39 = 2737.k suy ra A = 2737.k - 39 = 2737.(k-1) + 2698
Do 2698 < 2737 nên 2698 là số dư của phép chia số A cho 2737