Tính khối lượng oxi cần dùng để đốt cháy hoàn toàn: a. Một tấn than chứa 95% cacbon. Các tạp chất còn lại không cháy b. 4 kg khí metan (CH 4 ) tinh khiết

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Write a short story about A Midsummer Night's Dream của William Shakespears. - Một đoạn ngắn khoảng 4 dòng về ý chính của truyện

VI. Choose the sentence that has the same meaning as the first: 1. As soon as I receive my result, I will phone you. A. I will ring you the moment I receive my result. B. Sooner or later after I receive my result, I will give you a ring. C. After receiving my result, I will call you. D. I will make a phone call to you when I get my result. 2. When I was a young girl, chocolate was one of my favorites. A. When very young, I like eating chocolate cakes. B. Chocolate used to be a favorite of mine when I was young girl. C. My favorite was chocolate as was a little girl. D. Being a little girl, I like chocolate. 3. I haven’t seen my aunt for years. A. I haven’t meet my aunt for long ago. B. The last time I met my aunt was since years ago. C. I last saw my aunt years ago. D. I didn’t see my aunt years ago. 4. I think it’s necessary to tell Tim about it at once. A. Tim may be told about it at once. B. Tim might be told about it at once. C. Tim must be told about it at once. D. Tim should be told about it at once. 5. It is essential that we meet him at the airport. A. He must be met at the airport. B. He might be met at the airport. C. He should be met at the airport. D. He may be met at the airport.

2.x = 3.y; 5.y = 7.z và 3.x - 7.y + 5.z = 30

Một số tính chất của tam giác (trong hình học Euclid)