viết các phương trình sản xuất Cao

Giúp mình bài này với!!! Bài từ vuông góc đến song song nha!

Viết các câu sau với mệnh đề if (1,2,3) 1.It was raining. That's the only reason I didn't take the children to the beach. =>If.... 2. When I bought this house I didn't realize that in summer planes skimmed the roof every five minutes.(If I (knew)...I(not buy)etc.) =>If.... Nhờ mn giúp mik

Phân tích các đa thức thành nhân tử x ² - 2xy + y + 3x - 3y - 10

Mọi người giúp mình bạn này nhé

III. Choose the word / phrase (A, B, C or D) that best fits the space in each sentence: 1. The Ao dai is the __________ dress of Vietnamese women. A. national B. stylish C. casual D. traditional 2. __________ can fashion designers modernize the Ao dai? A. What B. Why C. How D. Where 3. In some industries workers have to wear masks __________ work. A. at B. on C. in D. with 4. What is your favorite type of clothing __________ special occasions? A. at B. from C. in D. on 5. The work of a __________ is to give advice on how and what to wear to people. A. stylist B. clothes maker C. clothing maker D. fashion designer 6. Schools look more colorful and __________ when students wear casual clothes. A. living B. lively C. alive D. live 7. Young __________ always has different opinions on fashion compared with adults’ ones. A. generation B. inspiration C. women D. students 8. It’s terrible. He __________ those jeans for a week. A. wore B. has worn C. was wearing D. wears 9. Yellow __________ you, but the blouse doesn’t __________ the skirt. A. matches / suit B. suits / fit C. suits / match D. fits / match 10. Ân: “What do you think of the Hanbok, Korean traditional costume?” Bình: __________. A. You like it. B. I will wear it. C. I like it. D. I think of it very much. 11. Nhi said that she __________ wearing long-sleeved blouses. A. love B. loves C. loved D. has loved 12. No new styles of jeans __________ since their last performance. A. has been made B. have been made C. are made D. were made 13. Jeans started __________ 200 years ago. A. wear B. to wear C. wearing D. to be worn 14. There is no need __________ of what to wear every day. A. think B. to think C. thinking D. to be thinking 15. Children in Central highlands of Vietnam used to be __________ Korean actors and actresses. A. summed up B. worn out C. named after D. tried on 16. We should always __________ our students to try their best all the time. A. match B. embroider C. encourage D. persuade 17. Women are often the __________ for his songs. A. inspiration B. occasion C. generation D. conclusion 18. Wearing casual clothes at school doesn’t make students feel __________ to one another. A. unique B. equal C. convenient D. logical 19. What __________ would you like, silk or cotton? A. symbol B. label C. material D. style 20. How long __________ the Ao dai? - Since 1995. A. have you painted B. did you paint C. were you painting D. do you paint 21. __________ she __________ printing lines of poetry on the Ao dai in 2000? A. Has / begun B. Did / began C. Was / beginning D. Did / begin 22. Nam: Why should secondary school students wear uniform at school? Lan: __________. A. Because it is convenient. B. Because it is cheap. C. Because it makes students feel comfortable. D. Because it makes students feel equal in many ways. Giúp mình với ạ

Cho tam giác ABC có độ dài ba cạnh là a$\leq$ b$\leq$ c. CMR : $(a+b+c)^{2}$ <9bc

Làm giúp tui phần e nhé, mấy phần còn lại tui làm xong rồi. Sợ mn nhìn không được đề nên tui viết đề ra nè Cho tam giác ABC nhọn có AB<BC, đường cao BK. MN là hình chiếu của K trên AB, BC. Chứng minh: a)BM.BA=BN.BC b)Tam giác BMN đồng dạng với tam giác BCA c)Góc BNM=góc BAC d)Tứ giác AMNC có tổng 2 góc đôi bằng 180 độ e)MN cắt AC tại D. Chứng minh: DM.DN=DA.DC

1) They reported that a troop were going to the front. ->A troop... 2)Minh is a more skillful tennis player than Chi ->Minh plays... 3)Does your brother use the Internet every day? ->Your brother... 4)Paul needs to cut the grass in the garden ->The grass..

Cho tỉ lệ thức a/b=c/d.Chứng minh rằng a-c/b-d=a+c/b+d.C ơn nha