mk ko biết có đúg ko nữa

____ Dear (Name of friend) I recently visited the Summer Science Museum Exhibition and it was really fun! I have seen so many interesting things that I would love to see again. I went with one of my close friends, and we spent quite a long time getting ready. When we left the weather was really nice and it was really sunny. We went to the museum, and it was really big. It's really easy to get lost in, but we keep it together. First of all we look at all the scientific things, dry as many different things and chemical experiments. We had lunch at the museum, in a special hall. There were so many people, and it was fun! Then we went to the cinema and watched a science movie about planets and the universe. It is very interesting. I would love to go there again! Maybe you can come to me? Love, ______ (Your name)

Một máy biến áp lí tưởng có cuộn sơ cấp gồm 1000 vòng, cuộn thứ cấp gồm 50 vòng. Điện áp hiệu dụng giữa hai đầu cuộn sơ cấp là 220V. Bỏ qua mọi hao phí. Điện áp hiệu dụng giữa hai đầu cuộn thứ cấp để hở là

A. 44V

B. 110V.

C. 440V.

D. 11V.

Write a personal letter (Viết một bức thư cá nhân)
Topic: Write a letter to a friend to tell him or her about a place you’ve just visited.
(Chủ đề: Viết một bức thư gửi một người bạn để kể về một nơi bạn mới ghé thăm.)
Đọc bức thư cá nhân của bạn Mai gửi cho bạn Jenifer để kể về chuyến đi du lịch của bạn ấy.
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No.12, Nhan Hoa Street
Nhan Chinh District, Hanoi City, Vietnam
July 6, 2014
Greetings
Dear Jenifer,
It’s very nice to write you again. How are you? I have just returned from my summer trip to Nha Trang with my family. Let me tell you about that interesting trip.
Well, Nha Trang is a major city of Khanh Hoa province, Vietnam. This beautiful city is a popular destination for tourists because of its wonderful beaches with turquoise water.
Although Nha Trang is more than 1000 km from Hanoi, it only took us two hours to get there by plane. On our five days there, we enjoyed eating seafood, sightseeing some famous places and walking along the beach at night. All the sights are so magnificent. The weather was perfect, too. It was sunny and windy during the time we were there. Local people are also very hospitable. The trip has made a good impression on all members in my family. Next year, if we have time, we will come back this great city.
Dear, Lan