Hãy trình bày cách tách các chất sau đây ra khỏi hỗn hợp A. Tách dầu ăn ra khỏi nước B. Tách muối ăn ra khỏi nước muối C. Tách đường saccarozơ ( đường cát ) ra khỏi hỗn hợp đường với cát D. Tách cồn ( rựu etylic ) ra khỏi hỗn hợp cồn với nước biết cồn là một chất lỏng tan tốt trong nước và có nhiệt độ sôi là 78,3°C Mọi người giúp em với ạ em cần gấp , không chép mạng nha làm gọn được chừng nào thì làm gọn em cảm ơn

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I. Choose the word that has the underlined part pronounced differently from the others. 1. A. brother B. love C. money D. lose 2. A. chicken B. watch C. Christmas D. change 3. A. busy B. much C. but D. under 4. A. inches B. checks C.roofs D. aches 5. A. laughed B. missed C. called D. watched Key: 1. D; 2. C; 3. A; 4. A; 5. C; II. Choose the word or phrase that best complete each sentence. 1. Hung is ………….. student in my class. A. good B. better C. the best D. a best 2. Ho Chi Minh City is larger and ……….. beautiful than Hanoi. A. more B. as C. most D. the most 3. She has bought this dress ………………Saturday. A. for B. since C. next D. last 4. Minh ……………. in this town since 1987. A. is living B. has lived C. lives D. lived 5. The Sun ….in the East. A. rise B. rose C. rises D. rising 6. That boy has short ………….hair. A. curly B. oval C. tall D. reserved 7. Alexander Graham Bell …………….. the telephone in 1876. A. invent B. invented C. invents D. is inventing 8. You must cover ………………sockets so that children do not try to put anything into them. A. electrical B. dangerous C. safe D. suitable 9. ……………. Was Alexander Graham Bell born? He was born in 1847. A. When B. Where C. Why D. Who 10. A: Can I speak to Lan please? This is Hung. A. Hello, Lan B. Hello,Hung C. How are you? D. How about tomorrow? 11. Revision is …………… when we learn new words. A. necessary B. necessarily C. more necessary D. unnecessary 12. Could you do me a favor?........................ A. Why? B. I’m sorry. I’m really busy. C. What can I do for you? D. Both B and C are correct 13. Hey! Lan. How about...................... to the cinema this afternoon? - OK. A. to go B. going C. we go D. go 14. ………you need any help? Yes. That’s very kind of you. A. Do B. May C. Can D. Could 15. “Why was Ba late?” “………………he got up late.” A. However B. So C. Because D. While