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HOAIBEO
2 năm trước
giúp e vs các cao nhân cảm ơn ah thu gọn các đơn thức sau và chỉ ra phần hệ số ,phần biến và bậc của các đơn thức đó a)5x ² (-3) xy ³ b)-1/4(2xy ²) ² . 6xy ³
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Rewrite the following sentences so that the second sentence means nearly exactly the same as the first 1. We have learnt English for 4 years. -> We started………………………………………… 2. My father started to give up smoking last year. -> My father has…………………………………… 3. They have worked in that factory since 2001.-> They started……………………………………………… 4. Lan hasn’t written to Maryam for a month. -> Lan didn’t……………………………………………… 5. Ha has lived in Hanoi since he was 12.-> He started………………………………………………… 6. I haven’t seen her for a long time. -> I didn’t…………………………………………………… 7. He finished his exercises on time. -> His exercise ………………………………………… 8. People plant rice in those fields. -> Rice……………………………………………………… 9.They use cars and trucks to carry food to market. -> Cars and trucks …………………………………… 10. This boy broke my window yesterday-> My window …………………………………………… 11. They have known him well. -> He ………………………………………………… 12. We will meet him at the station. -> He……………………………………………

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