Câu 4: Cho 56g hỗn hợp X gồm CuO và MgO phản ứng vừa đủ với m (g) dung dịch HC1 x% thu được dung dịch Y chứa 111g hỗn hợp muối, trong đó MgCl2 có nồng độ 12,5% và CuCl2 có nồng độ y%. a) Tính phần trăm khối lượng mỗi chất trong X. b) Tính các giá trị m, x và y.

I. Choose the correct answer. 1. I studied hard all day. Now I feel............................. A. tired B. tiring C. tiredness D. tiredly 2. I am....................... of snakes. A. frightening B. frightened C. frighteningly D. fright 3. Don’t show my baby photos to others, Mum! It’s so……………..….. A. embarrassingly B. embarrassed C. embarrassing D. to embarrass 4. The end of the film was so ..........................that many people cried. A. shocking B. moving C. exciting D. boring 5. I thought her new idea was very........................ A. fascinate B. fascinating C. fascinated D. to fascinate 6. I like to talk to her. I think she is an....................... person. A. interesting B. interested C. interests D. interest 7. Sit down. I have got some........................ news for you. A. excited B. exciting C. excitedly D. excitement 8. The children were almost....................... after a long trip. A. exhausted B. exhausting C. exciting D. disappointing II. Complete the sentences with the correct form of the adjectives in brackets. (Cho dạng đúng của tính từ trong ngoặc) 1. It is a ............................ book and I am ........................ every time I start reading it. (bore) 2. We were all very....................... about the school trip but it wasn’t an.................. trip at all. (excite)

Mong mọi người cho em 1 comment để khen 1 người/tổ chức có ý tưởng hay sáng tạo và có tính thực tiễn với ạ(Càng dài càng tốt ạ em lấy điểm kt)

I like beef and my sister .... (điền cái nào vậy: too, either, so, neither

Bai 12: Chọn đáp án đúng. 1. I didn’t drink ___ last night. A. any beer B. some beer C. any beers 2. There isn’t ___ food left. A. any B. some C. a 3. Would you like ___ glass of water? A. any B. some C. a 4. I need some ___ to write a letter. A. papers B. sheet of paper C. sheets of paper 5. Do you have any science_____? A. a book B. book C. books 6. There ____ any noodle left for you. A. isn’t B. aren’t C. is 7. I often have ___ slices of bread for breakfast. A. any B. some C. a 8. There aren’t ___ fish in the lake. A. any B. some C. a 9. I’d like _____ milk , please. A. any B. some C. a 10. There are ___ sheep in the fields. A. any B. some C. a

DẠNG I:Put the correct form of verbs 1. If I (know) that you were ill, I (go) to see you. ………………………………………………………………………………………… 2. If she'd had enough, she (buy) a car. ………………………………………………………………………………………… 3. I (buy) a car if you lend me some money. ………………………………………………………………………………………… 4. I (see) him if I (go) to the party last night. ………………………………………………………………………………………… 5. We could have gone out if the weather (not be) so bad. ………………………………………………………………………………………… 6. If the book (not be) expensive, Ill buy it. ………………………………………………………………………………………... 7. You would be very surprised if he (return) ………………………………………………………………………………………… 8. Ill go out if it (not rain) à ………………………………………………………………………………………… 9. They wouldnt come to the party if you (not invite) them.………………………………………………………………………………………… 10. What you (do) if you (be) him? ………………………………………………………………………………………… 11. If that hat costs much, I (buy) a small one. ………………………………………………………………………………………… 12. If you (drive) more carefully, you wouldn’t have had so many accidents.………………………………………………………………………………………… 13. If I (make) that mistake again, my teacher will get angry with me. ………………………………………………………………………………………… 14. If I spoke English, my job (be) a lot easier. ………………………………………………………………………………………… 15. If he (go) to London yesterday, he (meet) his old friend. ………………………………………………………………………………………… 16. I will lend them some money if they (ask) me.………………………………………………………………………………………… 17. If we had known who he was, we (invite) him to speak at our meeting.……………………………………………………………………………………. 18. My dog will bark if it (hear) any strange sound. ………………………………………………………………………………………. 19. If I (have) enough money, I would buy a house. ………………………………………………………………………………… 20. They (let) you in if you come late. ……………………………………………………………………………………. 21. He didn’t listen to the teacher. If he (listen) carefully, he (perform) well in the examination. …………………………………………………………………………. 22. He’s waiting for his mother to come back from Chicago. If his mother (come) home, he (have) a lot of presents. ………………………………………………………………………………………… 24. If I (be) you, I (tell) the truth. ………………………………………………………………………………………… 25. I was busy. If I (have) free time. I (go) to the cinema with you.…………………………………………………………………………………….….. 26. It’s too bad Helen isn’t here. If she (be) here, she (know) what to do.………………………………………………………………………………….…….. 27. I could have understood him if he (speak) more slowly.……………………………………………………………………………….……….. 28. The kitchen will look better if we (have) red curtains.……………………………………………………………………………….……….. 29. If I knew his address, I (go) round and see him. …………………………………………………………………………….………….. 30. If you (not be) so busy, I would have shown you how to play.……………………………………………………………………………….………..

: Cho Phương trình x2 – 2x + m + 2 = 0 Tính tổng, tích theo m

Lm hộ mik bài 3 vs ( kẻ hình cx đc ạ hoặc k ) Mik sẽ vote 5 sao ạ

I. USES OF ENGLISH: Choose and underline the correct answers: 1. If you know where she lives, please let me ………….(know/ knew/ known/ to know) 2. Unless you understand, I ………..(a/ was/ will/ would) explain it again to you. 3. The air in the city is very ……….(pollute/ pollution/ polluted/ pollutant) 4. The accident happened because of driving………………(careful/ carefully/ careless/ carelessly) 5. He is going to ………………..(collect/ collection/ collective/ collector) all the bags. 6. If they …………….(are/ were/ have/ had) pupils, they must wear uniform. 7. She was …………(happy/ happily/ unhappy/ unhappily) because of her bad result. 8. She has …………..(kind/ kindly/ kindness/ unkind) provided a picnic lunch fo us. 9. We ……………(won’t buy/ wouldn’t buy/ haven’t bought/ didn’t buy) this car if it is expensive. 10. If he careful, he ……………..(will/ would/ could/ must) get good marks. 11. This newspaper is..(publishing/ published/ to publish/ publish)everyday. It’s a daily newspaper. 12. He shouted and looked ………(angry/ angrier/ angrily/ anger) at me when I broke the vase. 13. He is tired now ……….(so/ because/ but/ and) he stayed up late watching TV. 14. We are talking about the preservation of …………(natural/ naturally/ nature/ naturalize) resources. 15. We’ll make this beach clean and ………..(beauty/ beautify/ beautiful/ beautifully) again. 16. She sings very ……………..(beauty/ beautify/ beautiful/ beautifully). 17. If the …………(pollution/ pollute/ polluted/ pollute) continues, what will happen? 18. If it …………(doesn’t rain/ didn’t rain/ hadn’t rain/ won’t rain), we’ll go to the movies. 19. A large number of inhabitants have made ……………(suggest/ suggestion/ suggested/ to suggest) on how to protect the environment. 20. Be ……….(care/ careful/ carefully/ carelessly)! He is looking at you.

Câu 4. Rễ giả được tìm thấy ở thực vật nào dưới đây ? A. Bạch quả B. Rêu C. Dương xỉ D. Bèo hoa dâu