Bài 3: Rút gọn biểu thức: a) b) c) (x+1)2-2(x-3) d) e) f) g) (x + 2)2 - (x + 2)(x - 2) h) (x + 2y ).(x - 2y) - (x – 2y)2

suy nghĩ của em về sự đồng cảm sẻ chia trong cuộc sống văn lớp 9 giúp mình vs cần gấp

16. Traditionally, the “ ao dai” …………………..by both and and women. A. has frequently worn B. was frequentwearing C. was frequently worn D. frequently wore 17. The material used to make jeans was very ……………..and it didn’t wear out easily. A. solid B. difficult C. hardly D. strong 18. In the 1960s, it was the …………………for women to wear very short skirts. A. method B. clothing C. pattern D. fashion 19.The word jeans comes from a kind of material that .................in Europe . A. made B. has made C. was made D. is made 20. The ao dai .................................for years. A. is modernized B. was modernized C. has been modernized D. will be modernized 21 . A lot of guests (khách mời) ………………, but few came. A. was expected B. were expected C. expected D. have been expected 22. My mother only wears ao dai ..........................special occasions. A. at B. in C. on D. with 23 . This old car needs .................... A. to fix B. fixing C. to be fixed D. B & C are correct 24. The animal performance is going to.............................on television tonight . A. show B. be showing C. be shown D. be show 25. The house looks very old. When ………………….….it built ? A. does B. do C. did D. was 26. They are wearing the unforms with lables …………..their school’s name. A. bear B. to bear C. bearing D. to bearing 27. They …………………in Hue ………………..a long time. A. were living/ for B. were living / since C. have lived / for D. have lived / since 28. A…………is a person whose job is to decide how to make things or decide their shape or appearance. A. sailor B. pen pal C. writer D. designer 29. Jean cloth is very strong and hardly ……………. A. wears out B. puts on C. takes off D. tears at 30. Jeans are very ………………with young people all over the world. A. favorite B. suitable C. popular D. famous 31. Tomatoes should …………..in the spring. A. plant B. be plant C. be planted D. to be planted 32. In the 1990s, the sale of jeans stopped ……………. A. to grow B. growing C. grown D. to be grown 33. ……………..to America ?- Yes twice A. Did you ever go B. Have you ever been C. Have you ever visited D. Do you ever go 34. What is the ..............................of your dress? Is it made of silk ?. A. design B. material C. clothing D. fashion 35. …………….have fashion designers done to modernize the Ao dai? A. How B. What C. Why D. Where 36. It’s necessary for secondary school students …………………..uniforms when they are at school. A. wear B. to wear C. wearing D. to wearing 37. Jeans are made …………………cotton, aren’t you? A. by B. in C. from D. with 38. Vietnamese women today prefer modern clothing ……………..Ao dai. A. for B. in C. with D. to 39. He’s only 24, but he’s already achieved …………………fame. A. country B. worldwide C. nation D. traditional 40. The national dress of Japanese women is ……………….. A. Aodai B. Sari C. Jeans D. Kimono 41. Do you think jeans will be ……………………..? A out of date B. out of order C. out of work D. out of fashion 42.The number of people who wear jeans is increasing ; that’s why sales of jeans are ................. up. A. raising B. running C. pulling D. going 43. My uncle is ................. He composed music and plays the piano very wel. A. musician B. music player C. music writer D. music fan 44. Wearing uniforms encourages students to be proud................... their school. A. of B. with C. to D. at giúp vs nhanh nha toàn trắc nghiệm

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LÀm giúp em bài này đi ạ!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Bằng phương pháp hóa học hãy nhận biết 3 chất: SiO2, SO2, K2SO4

Xin hãy giúp mình là ưu điểm và nhượng điểm nha

Tìm x , biết a.x^2-9+x-3=0 b.(x+1)^2-x(x+5)=3 c. x^3-x=0

giúp mik vs ...................................

tìm hiểu tính mạch lạc trong văn bản mẹ tôi ko chép mạng