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Làm sao để viết được phân số to trong câu lệnh latex , nó cứ nhỏ như này : \(\left[ \begin{array}{l}x=\frac{4}{3}\\x=-1\end{array} \right.\)

Thành phần của Amphetamine gồm C, H, N chiếm phần trăm theo khối lượng tương ứng lần lượt là 80%; 9,63%; 10,37%. Xác định công thức phân tử của Amphetamine biết trong phân tử có 1 nguyên tử nitơ.

Hứa trả 5 sao, 1 cảm ơn và 1 ctrlhn Làm nhanh hộ với em mik đag gấp

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Câu hỏi 110 điểm Give correct form of Present simple – Present continuous to verbs in brackets. 1. It's seven o'clock and they (go) to school now. 2. Mrs. Cooper (eat) in the restaurant every Sunday. 3. Our cat never (jump) on the kitchen table. 4. Look! The men (wear) blue uniforms. 5. The taxi (wait) for them at the moment. 6. He always (help) his grandmother in the coat. 7. Listen! Bill (play) his electric guitar. 8. He (wash) his car every Sunday. 9. The alarm (ring) at seven o'clock every morning. 10. They always (bring) their aunt a tree for Christmas. Đánh dấu câu hỏi này Câu hỏi 210 điểm Give correct form of Future simple – Future continuous to verbs in brackets. 1. She (not / come) with us, I'm sure. 2. This time next month I (enjoy) the holidays. 3. I think he (find) this work more interesting when he grows up. 4. He (give) me 20$ a day during my stay. 5. Hold on, I (give) you a lift! 6. I suppose the weather (be) good. 7. At 11 p.m. I (sleep) . 8. You can recognize her easily. She (wear) a red skirt. 9. I (help) you as soon as I finish this project. 10. At 10 p.m. I (go) to bed to get some rest. Đánh dấu câu hỏi này Câu hỏi 310 điểm Give correct form of Past simple – Present perfect to verbs in brackets. 1. I (see) a great film yesterday. 2. (you / ever / buy) a cheap laptop? 3. Sue (have) the flu last winter. 4. A few days ago we (drive) to his uncle. 5. They (play) bingo on Wednesday afternoon. 6. He (already / take) the bus to get there. 7. Last week my rabbit (run) . 8. We (do) a lot last Sunday. 9. She (not / wake up) yet. 10. I (not / meet) her since last Thursday. mình sẽ cho 5 sao

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Mn giúp e bài I và II vs Ạ. E cảm ơn

III. Supply the correct forms of the words in brackets (5 points) 1. There are many cultural _____ between his country and mine. (DIFFER) 2. The festivals in my village are always _____ held. (TRADITION) 3. Vung Tau beach is said to be one of the _____ places in Vietnam. (LOVE) 4. You should _____ your trousers, they are too long for you. (SHORT) 5. “Too many _____ spoil the dish” is a famous saying. (COOK)