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Cho tam giác ABC, gọi M, N là trung điểm của AB, AC, biểu diễn vectoMN = m . vectoCM + n . vectoBN. Khi đó m = ...
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Ex1. Đặt câu hỏi với từ được gạch chân 1. The homework was very difficult yesterday. →…………………………………………………………. 2. She often does the housework after doing exercises. →…………………………………………………………. 3. They are planting some roses in the garden. →…………………………………………………………. 4. Liz will send these letters to her friends. →…………………………………………………………. 5. They returned to America two weeks ago. →…………………………………………………………. 6. It’s about 1,500 km from Hue to Ho Chi Minh City. →…………………………………………………………. 7. I often listen to music in my free time. →…………………………………………………………. 8. She learns about computers in computer science class. →…………………………………………………………. 9. Someone gave some money to Mike. →…………………………………………………………. 10. She left her suitcase on the train. →…………………………………………………………. Ex2. Dùng từ để hỏi đặt câu hỏi cho những câu sau, ít nhất 2 câu hỏi: 1. My cousin started sailing six months ago. →…………………………………………………………. →…………………………………………………………. →…………………………………………………………. 2. I bought two kilos of oranges. →…………………………………………………………. →…………………………………………………………. →…………………………………………………………. 3. I watched a very good film on TV last night. →…………………………………………………………. →…………………………………………………………. →…………………………………………………………. 4. I was tired yesterday evening because I worked very hard. →…………………………………………………………. →…………………………………………………………. →…………………………………………………………. 5. Mary invited a lot of people to the party. →…………………………………………………………. →…………………………………………………………. →………………………………………………………….

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