Một vật có khối lượng 500 gam đang chuyển động với vận tốc 10 m/s động năng của vật là
Lớp 5a mua một số vở . Nếu đưa mỗi bạn 9 quyến thì còn thừa 40 quyến.Nếu đưa mỗi bạn 10 quyến thì còn thiếu 10 quyến . Tính lớp 5a đã mua bao quyển
Rewrite the sentences so that it has similar meaning as the sentence printed before, using the words given. 41. They will install solar panels on the roof of our house next week. A. Solar panels will be installed on the roof of our house next week. B. Solar panels will being installed on the roof of our house next week. C. Solar panels will be install on the roof of our house next week. D. Solar panels will be instaled on the roof of our house next week. 42. Will the plumber check cracks on the water pipes in two days? A. Will cracks on the water popes being checked in two days ( by the plumber)? B. Will cracks on the water popes be checked in two days ( by the plumber)? C. Will cracks on the water be checked popes in two days? D. Will cracks be check on the water popes in two days? 43. They sell these chemicals everywhere in my hometown. A. These chemicals everywhere are sold in my hometown. B. These chemicals are selled everywhere in my hometown. C. These chemicals were sold everywhere in my hometown. D. These chemicals are sold everywhere in my hometown. 44. They destroy the old thermal power plant at the end of this year. A. The old thermal power plant will destroyed at the end of this year. B. The old thermal power plant will being destroyed at the end of this year. C. The old thermal power plant will be destroyed at the end of this year. D. The old thermal power plant will be destroy at the end of this year. 45. They will widen the road to our village next year. A. The road to our village will be widen next year. B. The road to our village will be widened next year. C. The road to our village will being widened next year. D. The road to our village will be widening next year. 46. We will be using biogas for cooking and heating at this time next month. A.Biogas won’t be used for cooking and heating at this time next month. B. Biogas will be use for cooking and heating at this time next month. C. Biogas will be used for cooking and heating at this time next month. D.Biogas will be using for cooking and heating at this time next month. 47. They got the first prize at the competition. A. The first prize was got at the competition. B. The first prize had gotten at the competition. C. The first prize was gotten at the competition. D. The first prize has gotten at the competition. Use the cues given to write correct sentences. 48. save/ energy /one/best/way/ conserve/ natural/ resources A. Saving energy is the best ways to one of conserve natural resource. B. Saving energy is one of the best ways to conserve natural resource. C. Saving energy is one of ways to conserve the best natural resource. D. Saving energy is the best ways to conserve natural resource. 49. not leave/fridge/open/cold air/escape/use/lot/electricity A. Don’t leave the fridge door open because cold air is escaped and this is used a lot of electricity. B. Don’t leave the fridge door open because cold air escapes and this uses a lot of electricity. C. Don’t leave the fridge door open because cold air escape and this use a lot of electricity. D. Don’t leave the fridge door open because cold air was being escaped and this uses a lot of electricity. 50. Turn/all/light/every/time/leave/room A. Turn on all the lights every time you leave the room. B. Turn off all the lights every time you are in the room. C. Turn on all the lights every time you leave the room. D. Turn off all the lights every time you leave the room.
Cho tam giác ABC vuông tại A, tia phân giác của góc ABC cắt AC tại D. E là một điểm trên cạnh BC sao cho BE = BA a) Cm tam giác ABD = tam giác EBD b) Cm DE vuông góc BC c) Gọi F là giao điểm của BA và ED. Cm DC = DF
nguoi ta xep 1 so vien gach dang hinh hop chu nhat tao thanh 1 khoi gach hinh lap phuong co canh 20 cm tinh dien tich xung quanh va dien tich toan phan cua khoi gach hinh lap phuong
Một lực 20N tác dụng vào vật m đang nằm yên thời gian tác dụng 0,015s. Xung lượng của lực tác dụng trong khoảng thời gian đó là
Chuyển thành câu bị động : They built that building in 1980 Nam played games online last night He plays soccer in the afternoon
Khi trùng ngưng a gam axit ԑ-aminocaproic (H = 80%) thu được m gam tơ capron và 14,4 gam H2O. Giá trị của m là nH2N-[CH2]5-COOH → (-NH-[CH2]5-CO-)n + nH2O nH2O = 0,8 mol → nmắt xích polime = 0,8 mol → mpolime = mmắt xích polime = 0,8.113 = 90,4 gam bài này sao ko nhận chia hiệu suất vậy?
Bài 2. Tìm và phân tích tác dụng của phép ẩn dụ được sử dụng trong những đoạn thơ sau: c. Một cây làm chẳng nên non Ba cây chụm lại nên hòn núi cao ( Tục ngữ) d. Một mặt người bằng mười mặt của ( Tục ngữ)
1) Tìm điều kiện của x để biểu thức A có nghĩa . 2) Rút gọn biểu thức A . 3) Giải phương trình theo x khi A = -2 .
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