Giúp mình với mình sẽ vote 5 sao

Nhận xét nào sau đây là sai? A: Sự oxi hóa chậm là quá trình oxi hóa có kèm theo tỏa nhiệt nhưng không phát sáng. B: Oxi là chất oxi hóa trong các phản ứng hóa học. C: Sự cháy là sự oxi hóa có kèm theo tỏa nhiệt và không phát sáng. D: Sự oxi hóa là quá trình tác dụng của một chất với oxi.

Hãy viết đoạn văn khoảng 7 câu cảm nhận về đất nước sau khi đọc bài “đất nước ở trong tim”. Trong đó có trạng ngữ, câu đặc biệt. Chú thích rõ.

Hiện nay tuổi của anh gấp đôi tuổi của em . Nhưng 10 năm nữa thì tổng số tuổi của hai anh em là 32 tuổi . Hỏi người anh sinh năm nào?

Bài 4. Cho điểm B nằm giữa hai điểm A và C, điểm D thuộc tia BC và không trùng B, điểm O nằm ngoài đường thẳng AC. Trong ba tia OA, OB, OD tia nào nằm giữa ha tia còn lai. VẼ HÌNH VÀ GIẢI THÍCH Ạ , MÌNH CẢM ƠN .

In the 1980s feminism became less popular in the US and there was less (1) ____ in solving the remaining problems, such as the fact that most women still earn (2) ____ less than men. But American women have more opportunities than anyone thought possible 40 years (3) ____. One of the biggest discrimination is in (4) ____ people think. Although there 4. Businesses seem to pay more attention to gender issues in senior positions. Most of the senior positions are occupied by male officers. Feminism has brought (6) ____ many changes in the English language. Many words for job (7) ____ that included 'man' have been replaced, for example 'police officer' is used (8) ____ of policeman' and 'chair' or 'chairperson' for 'chairman'. 'He' is now rarely used to (9) ____ to a person when the person could be either a man or woman. Instead, he/she, or sometimes (s)he, is preferred. The title Ms is used for women instead of 'Miss' or 'Mrs', since, like 'Mr, it does not show (10) ____ a person is married or not. 1. A. concern B. interest C. worry D. care 2. A. much B. so C. too D. as 3. A. earlier B. before C. ago D. then 4. A. what B. which C. that D. how 5. A. wide B. widen C. wider D. widely 6. A. about B. in C. up D. to 7. A. names B. titles C. places D. posts 8. A. in terms B. instead C. on behalf D. in position 9. A. refer B. point C. show D. indicate 10. A. either B. neither C. whether D. rather

Nowadays television becomes very popular. Every house, from the city to the country, has a color TV set. After a hard day's work, everybody, young and old alike enjoy watching it. TV programmes attract millions of viewers all around the world. Through television we can see different events all over the world and we can know the latest inventions of scientists. In addition to the news, television station also broadcast many interesting programs such as sports, music, cartoon, wild life movies. People of different interests can tune in their favourite programmes simply by selecting the right channe. At times, we can enjoy a live programme on our TV. We are delighted to see launching of a sputnik into the space of the exciting Olympic competitions going on before our eyes as these events are actually happening. 1. Answer the questions a. What becomes very popular nowadays? b. Do people enjoy watching TV after a hard day's work? c. In addition to the news, what do television stations also broadcast? d. Can we enjoy a live programme on TV?

Exercise 8 1. They________ tomorrow at 12:30 a. will leave b. are leaving c. are going to leave d. leave 2. Someone________ at the door, can you answer it? a. knocks b. is knocking c. has knocked d. knocked 3. John________ at the moment, so he can't answer the telephone. a. works b. is working c. has worked d. will work 4. The river________ after last night's rain. a. flowed b. flows c. is flowing d. will flow 5. He________ for Chelsea this season. a. played b. is playing c. would play d. has played 6. We shall make a trip around the world when the opportunity________ itself to us. a. will present b. will have presented c. presents d. will be presenting 7. This pupil________ his best and ________ only one mistake in his dictation. a. made/did b. did/made c. made/made d. did/did 8. The holiday makers________ in the sunshine to get sunburnt. a. laid b. lied c. led d. laying 9. The snake________ one big egg last week. a. lay b. laid c. led d. laying 10. I'm afraid you________ number. a. have mistaken b. are with the wrong c. have the wrong d. made the wrong 11. I like looking at the pictures, but I ________ enough by lunch time. a. should have b. will have c. will have had d. have 12. I don't understand this sentence. What________? a. does mean this word b. have this word mean c. means this word d. does this word mean 13. John________ tennis once or twice a week. a. usually play b. in usually playing c. usually plays d. have usually played 14. It was noisy next door. Our neighbors________ a party a. had b. were having c. had had d. have had 15. It________ dark. Shall I turn on the light? a. is getting b. get c. got d. has got 16. I________ for Christine. Do you know where she is? a. look b. looked c. am looking d. looks 17. At 5 o'clock yesterday evening, I ________ my clothes. a. am ironing b. have ironed c. ironed d. was ironing 18. Are you ready, Ann? Yes, I________ a. am coming b. come c. came d. have came 19. Why________ at me like that? What's the matter? a. do you look b. have you looked c. did you look d. are you looking 20. I________ along the street when I suddenly heard footsteps behind me. a. was walking b. a walking c. walk d. walked

Cho 10g hỗn hợp Cu, Fe vào dung dịch HCl 20% ( vừa đủ ). Phản ứng kết thúc thu được 2,24 lít khí H2 ( đktc ) a. Viết PTHH b. Tính khối lượng mỗi kim loại có trong hỗn hợp ban đầu c. Tính khối lượng dung dịch HCl đã dùng trong phản ứng

x+2/2008+x+3/2007+x+4/2006+x+2028/6=0