tim số tự nhiên biết để a)Kmũ2+4K la SNT b)4Kmux2-K la SNT

Tại sao vải sợi pha lại được sử dụng phổ biến trong may mặc hiện nay?

→ It's ........ 3. I pay bill must by tomorrow the phone. >I must ..... Câ A. 4. They to be met expected by the General Director at the airport, > They ..... 5. the school John hoped to as headteacher be appointed of. → John 6. they of money spent the house a lot modernizing. > They 7. organization an the Nations is international United. > The United 8. many people take each who voluntarily care of nation has others. > Each 9. take part some students children in disadvantaged helping. > Some 10. him having I object to made office private the phone calls on. > I object Rewrite the sentence that has the same meaning with the given one. 11. My parents dọn't allow me tó come home after 10 p.m.(let) → My parents 12. He began studying in this school in 2018. → He ..... 13. It was not necessary for Nancy to clean the flat. (didn't) > Nancy .. 14. I could drive Susan's car while she was out of town last week. (allowed) > I was 15. She'd advise him to take a bus to school.(should) > He Giải hộ em vs ạ

giúp mik câu trắc nghiệm 15 16 luôn ạ, chỉ cần giải thích cách làm 1 câu thôi là mik hỉu rồi

→ It's ........ 3. I pay bill must by tomorrow the phone. >I must ..... Câ A. 4. They to be met expected by the General Director at the airport, > They ..... 5. the school John hoped to as headteacher be appointed of. → John 6. they of money spent the house a lot modernizing. > They 7. organization an the Nations is international United. > The United 8. many people take each who voluntarily care of nation has others. > Each 9. take part some students children in disadvantaged helping. > Some 10. him having I object to made office private the phone calls on. > I object Rewrite the sentence that has the same meaning with the given one. 11. My parents dọn't allow me tó come home after 10 p.m.(let) → My parents 12. He began studying in this school in 2018. → He ..... 13. It was not necessary for Nancy to clean the flat. (didn't) > Nancy .. 14. I could drive Susan's car while she was out of town last week. (allowed) > I was 15. She'd advise him to take a bus to school.(should) > He Giải hộ em vs ạ

đặt cho mk 6 câu để làm cho trường của chúng ta trở nên tốt hơn sạch sẽ hơn

đặc điểm chung của các vật phát ra âm thanh?

Giúp mình với mình đang cần gấp

Một ô tô chạy trên đoạn đường thẳng từ điểm A đến điểm B phải mất một khoảng thời gian t. Tốc độ của ô tô trong một phần ba đầu của khoảng thời gian này là 60 km/h, một phần tư tiếp theo của khoảng thời gian này là 50 km/h và phần còn lại là 90 km/h. Tốc độ trung bình của ô tô trên cả đoạn đường AB

Giúp tuii với mn ới cần gấp lém ạ:((