Nếu khối lượng 1 tế bào vi khuẩn là 5.10-13 gam, thời gian thế hệ là 20 phút, nuôi cấy trong điều kiện tối ưu thì sau bao lâu sẽ đạt được sinh khối bằng khối lượng cơ thể em?

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct word or phrase that best fits blank. As a result, astronauts are weightless and can sleep in __________ orientation. A: any B: no C: some D: quite a

Giải hệ phương trình : 2x + y = 1 và 6x + 3y = 4

Choose the word (A, B, C, D) whose main stress is placed differently from that of the others. Question 3: A. likely B. lovely C. kiddy D. apply Question 4: A. instruct B. decide C. contain D. common

Hãy viết đoạn văn diễn dịch khoảng 8-10 câu làm rõ nội dung sau: “Chiếu dời đô” ra đời phản ánh ý chí độc lập, tự cường và sự phát triển lớn mạnh của dân tộc Đại Việt

Put the verbs in brackets into the correct form 1) Would you mind if I ____________ you tonight? (not join) 2) Would you mind if I ____________ the fences? (paint) 3) Would you mind ____________ me the salt? (pass) 4) Would you mind ____________ a letter for me? (send) 5) Would you mind Daniel‟s ____________ TV here (watch)

Chỉ ra lỗi sai và giải thích lỗi sai giữa các câu trong đoạn văn sau: Đoàn thuyền đánh cá ra khơi trong cảnh màn đêm buông xuống. Sóng biển cài then, đêm sập cửa, vũ trụ đi vào yên tĩnh, vắng lặng. Bốn bề không một tiếng động. Lá cờ nhỏ sang bừng trên đỉnh cột buồm bay phần phật, gió ào ào dữ dội. Giúp em với ạ :(

11. If you………………….…….. any money, I’d give you some. hadn’t had haven’t had don’t have didn’t have 12. You’d earn more money if you…………………. more products. to sell sold sell would sell 13. If I……………………. so busy yesterday, I would have visited you. weren't aren't wasn't hadn't been Mục khác: 14. If you had seen the film, you………….……… it. will enjoy would have enjoyed would enjoy enjoyed Mục khác: 15. She would have gone to the university if she……………… the opportunity has will have had had had Mục khác: 16. If he had been more careful, he…………….…………. an accident. would not have had will not have does not have would not have Mục khác: 17. If you’d stayed at home, there …………………………. any trouble. would not be will not be is not would not have been Mục khác: 18. The table .......................... if you……………………. on it. will collapse/ stand would collapse/ stand would have collapsed/ stood collapses/ had stood Mục khác: 19 Had you left that wasp alone, it………………… you. would have stung wouldn’t sting wouldn’t have stung would sting Mục khác: 20. Unless I ……………that the traffic lights were red, I……………..…………... had realized/ would have stopped had realized/ wouldn’t have stopped realized/ would stop realize/ will not stop

. 3x(x -1)2 - 2x(x + 3)(x - 3) + 4x(x - 4)

BT/8. Tìm số tự nhiên , biết a) x+139=172 b) 6.x-54=78 c) (41-x).5^10=5^12 d) 3^x+3^x+2=90