Caill :Vương Nhất Bác màu xanh lá cây, trang trí,tradi nha

help 24. Both of the computers …… not working. A. were B. is C. was D. has been 25. Learning foreign languages …… necessary at all time. A. are B. will be C. were D. is 26. Money, nor fame, nor wealth …… brought happiness to everybody. A. has B. have C. are D. were 27. Most of the rooms in the hotel where we are staying …… air conditioning. A. have B. had C. has had D. has 28. The bottles of wine …… on the shelf. A. is B. are C. was D. has put 29. I think the teacher as well as his students …… good. A. is B. are C. be D. to be 30. None of the students …… the vice principal. A. has seen B .have seen C. is seen D. was seen 31. There …… a lot of expensive furniture in our uncle’s house. A. have been B. are C. is D. were 32. Each of you …… responsible for this. A. are B. being C. is D. be 33. Bill together with his brothers …… to the beach every morning. A. going B. goes C. are D. gone 34. Either the monitor or the athletes …… to blame for the bad result. A. be B. are C. is D. to be 35. Everyone …… with me about my plans. A. agree B. agreeing C. disagree D. agrees 36. Tim as well as his relatives …… safe from the hurricane. A. be B. is C. are D. being 37. The little boy with his friends …… coming here. A. be B. is C. are D. to be 38. Neither Jane nor her classmates nor her boy friend …… the problem . A. understands B. understand C. not understand D. understand not 39. The results of Dr. Frank’s experiment …… announced on TV last night. A. is B. are C. was D. were 40. Fifty minutes …… the maximum length of time allowed for the exam. A. is B. be C. are D. were 41. Each of the teachers …… a timetable. A. to have B. have C. having D. has 42. The cost of living …… over 10% in the last few years. A. rises B. has risen C. rose D. is rising 43. Neither the teacher nor the students …… happy about the test results. A. are B. is C. has D. have 44. A number of sheep …… eating grass now. A. is B. are C. was D. were 45. Measles …… sometimes a serious disease. A. is B. are C. being D. be 46. The effects of cigarette smoking …… been proven to be extremely harmful. A. has B. have C. is D. are 47. The number of students who …… withdrawn from class this semester …… appalling. A. has/is B. have/are C. have/is D. has/are 48. The exercise on agreement of subjects and verbs …… easy. A. are B. have C. has D. is 49. Making cakes and pies …… Mrs. Reed’s specialty. A. are B. were C. is D. be 50. The United Nations …… about 160 nations. A. consist of B. consisting C. consist D. consists of

Giúp mình các bạn ơi khó quá đi

giúp với ạ:> hứa vote mạnh tay ạ:>

(1/2-1/3)x6^x+6^(x+2)=6^15+6^18

Cần gấp :vvvvvvvvvvvvvvvvvvvvvvvvv

trong các phương pháp chế tạo phôi , những phương pháp nào dễ tự động hóa ? giải thích vì sao? gấp ạ

Em cần bài chính xác nhất ạ , giúp em với . Camon trước ạ:333

cho x,y,z là các số thực thỏa mãn x^2+y^2+z^2=3.tìm GTNN,GTLN cua P=x+y+2z

CMR A=3+3^2+3^3+4^4+3^5+3^6+3^7+3^8+...+3^97+3^98+3^99+3^100 chia hết cho 120