cho 1<=x<y<=2. tìm GTLN của M=(x+y)(1/x+1/Y)

Để hoà tan hết hỗn hợp Zn và ZnO phải dùng 100,8 ml dung dịch HCl 36,5% ( D = 1,19 g/ml ) thu được 8,96l khí.TÍnh giá trị M giúp mình với

Nghị luận xã hội : Trong cuốn nhật kí ghi ở chiến trường, chiến sĩ-bác sỹ Đặng Thùy Trâm đã viết "Chỉ có trái tim yêu thương mới gieo mầm hạnh phúc". Suy nghĩ của em về ý kiến trên?

Nancy adores _____________ with her best friend Helen.

MN giúp mik với hứa vote 5 sao và cảm ơn Choose the word or phrase (A, B, C, or D) which best completes each sentence. Circle the letter you choose 1. What time ..................on television? A. is the news B. are the news C. is news D. are news 2. That boy is better ..............math than I am A. in B. at C. for D. with 3. “Don’t cook a meal for me”, he said “ I’ve already.......” A. eat B. eating C. eaten D. ate 4. The room is empty, but I feel that...........is watching me. A. somebody B. anybody C. nobody D. everybody 5. I know that she .................in the library at the moment A. works B. is working C. worked D. has worked 6. She looks very.............when I told her the news A. happily B. happiness C. happy D. was happy 7. I haven’t seen Tom........three months A. since B. for C. until D. before 8. It is very cold...............winter. A. on B. in C. at D. since 9. The children were bored....................the film A. in B. by C. with D. of 10. My brother speaks English very........... A. bad B. badly C. worse D. worst 11. The girl...........is talking to Peter is my sister A. who B. that C. whose D. which 12. When we looked at the baby last night, he............. A. sleep B. slept C. sleeping D. was sleeping 13. Mary sings.............than Laura. A. more beautiful B. beautifully C. more beautifully D. most beautifully 14. We started ...........English 3 years ago. A. to learn B. learn C. learning D. learned 15. That is the room................the meeting is held. A. which B. who C. that D. where 16. It is this watch..................I gave my sister for her birthday A. which B. that C. who D. whose 17. This is the best book I............ A. read B. to read C. was reading D. have read 18. My father is really interested in.................books A. read B. to read C. reading D. reads 19. What do you call a person who...............physics? A. study B studying C. studies D. studied 20. J. Watt...........the steam engine A. invent B. invents C. invented D. has invented II. VOCABULARY AND EXPRESSION A. Choose the best answers 21. When a boy, Faraday didn’t have much............ A. school B. schooling C. study D. studying 22. Mr Sayer bores me. I think he is a............man A. bore B. boring C. bored D. boredom 23. Nam can run the...............in my class A. fast B. fastly C. most fast D. fastest 24. Mark Twain’s wife had great influence............his books A. in B. on C. at D. of 25. I love.................forest, hills and fields from the height A. to watch B. watch C. watching D. watched

vẽ về anime nha rồi vô chs chuyện xíu

Giúp mình câu b bài 2 nhá cám ơn mọi ngừi nè

B=(1-1/2).(1-1/3).........(1-1/n+1) với n€N

1 những chi tiết nào trong văn bản cà mau thể hiện sư sống lớn hùng vĩ của dòng sông và rừng nước của miền tây nam bộ 2

vì sao bảo quản trứng sống người ta dùng phương pháp bảo quản lạnh mà không dùng phương pháp bảo quản nóng