Hiện nay tổng số tuổi của mẹ và bà là 83 tuổi .Hỏi trước đây 2 năm tổng số tuổi của mẹ và bà là bao nhiêu ?

cấu trúc trung của máy tính điện tử là gì

Vì sao chính quyền họ nguyễn suy yếu (giúp mình với mai kiểm tra rồi)

Nhóm học sinh làm thí nghiệm với 1 lượng khí không đổi ban đầu lượng khí cho vào 1 bình kín có thể tích 200ml ở nhiệt độ phòng 27 độ C áp suất 1 atm sau đó nén chất khí đổ xuống V bằng 100ml và tăng nhiệt độ lên 50 độ C .Tính áp suất của lượng khí trên

1. People don’t use this road very often. A.This road is not used very often. B. Not very often this road is not used. C. This road very often is not used. D. This road very often is used. 2. How do people learn languages? A. How are languages learned? B. How are languages learned by people? C. How languages are learned? D. Languages are learned now? 3. Somebody is using the computer at the moment. A.The computer is being used at the moment. B. The computer at the moment is being used. C. The computer is being used by somebody at the moment. D. The computer is used at the moment. 4. They are building a new highway around the city. A. A new highway is being built around the city. B. A new highway is being built around the city by them. C. A new highway around the city is being used. D. Around the city a new highway is being built. 5. They have built a new hospital near the airport. A. A new hospital has been built near the airport by them. B. A hospital near the airport has been built. C. A new hospital has been built near the airport. D. Near the airport a new hospital has been built. 6. People should send their complaints to the head office. A. Complaints should be sent to the head office. B. Complaints should be sent to the head office by people. C. Their complaints should be sent to the head office by people. D. Their complaints to the head office . 7. They had to postpone the meeting because of illness. A. The meeting had to be postponed because of illness. B. The meeting had to because of illness to be postponed. C. The meeting had to be postponed by them because of illness. D. The meeting because of illness had to be postponed. 8. Somebody might have stolen your car. A. Somebody might have been stolen your car. B. Your car might be stolen. C. Your car might have been stolen by somebody. D. Your car might have been stolen 9. An electrical fault could have caused the fire. A. An electrical could have been caused by the fire. B. An electrical could have been caused the fire. C. The fire could have been caused by an electrical fault D. The fire could have caused an electrical 10. They will have changed the date of the meeting gain. A. The date of the meeting has been changed again. B. The date of the meeting has been changed by them again. C. The meeting has been changed the date again. D. The date of the meeting will have been changed again. 11. Brian told me that somebody had attacked him in the street. A. I told by Brian that somebody had attacked him in the street. B. I was told by Brian that he had been attacked him in the street. C. Brian told me to have been attacked in the street. D. Brian told me that he had been attacked in the street. 12. The teacher is going to tell a story. A. The teacher is going to be told by a story. B. The teacher is gone to be told a story. C. A story is gone to be told by the teacher. D. A story is going to be told by the teacher. 13. John used to visit Mr. Cole at weekend. A. Mr. Cole was used to visit by Jonh at weekend. B. Mr. Cole used to visited by Jonh at weekend. C. Mr. Cole used to been visited by Jonh at weekend. D. Mr. Cole used to be visited by Jonh at weekend. 14. They began to plant rubber trees in this big plantation. A. They were begun to plant rubber trees in this big plantation. B. They began to be planted rubber trees in this big plantation. C. Rubber trees were begun to planted in this big plantation. D. Rubber trees began to be planted in this plantation. 15. They say that many people were homeless after the tsunami. A. They say many people to have been homeless after the tsunami. B. They say many people to be homeless after the tsunami. C. Many people are said to have been homeless after the tsunami. D. Many people to be homeless after the tsunami. 16. They expect that the government will lose the election. A. The government is expected to have lost the election. B. The government is expected to lose the election. C. They expected the government lose the election. D. They expected the government have lost the election. 17. They think that the prisoner escaped by climbing over the wall. A. The prisoner is thought to escape by climbing over the wall. B. The prisoner is thought escaped by climbing over the wall. C. The prisoner is thought having escaped by climbing over the wall. D. The prisoner is thought to have escaped by climbing over the wall. 18. They believe that the thieves got in through the kitchen window. A. The thieves are believed to have got in through the kitchen window. B. The thieves are believed to get in through the kitchen window. C. They believe the thieves got in through the kitchen window. D. They believe the thieves have got in through the kitchen window

Xin mọi người giúp bài 30 điểm vẽ hình ra hộ e nữa nha 🙏🏻😭😭😭

We arranged to meet in .... At 6.30 A. Reception B. Suggestion C. Party D. Accordance

Bài 1 ( sách củng cố tập 2 lớp 6 ) Đề 1 Trên cùng một nửa mặt phẳng bờ chứa tia Ox , vẽ hai tia Oy và Oz sao cho : xOy=40 độ , xOz=80 độ a) Tia Oy có nằm giữa hai tia Ox và Oz không ? Vì sao b) So sánh góc xOy và góc yOz c) Tia Oy có phải là tia phân giác của góc xOz không ? Vì sao d) Vẽ tia đối Ot của tia Oy . Tính số đo góc yOt , zOt

Tại sao trong các phòng kín có gắn quạt thông gió thì quạt thường đặt ở trên cao? Nếu thay quạt bằng máy điều hòa nhiệt độ thì máy đó phải đặt ở đâu? Vì sao?

Muốn làm lạnh một lon bia nhanh thì ta đặt đá lạnh ở trên hay dưới lon bia? Vì sao?