so sánh sự khác nhau giữa trợ từ ,thán từ,tình thái từ

Trong các tên dưới đây, tên nào là không hợp lệ trong Pascal? Vì sao? A. Bai tap. B. Lop8A; C. Hinh_binh_hanh; D. Chuong_tình;

Cho tam giác ABC, K là 1 điểm thuộc BC từ k kẻ kH ss AB, h thuộc AC kẻ KI ss AC .Tìm điều kiện để của tam giác ABC để AIKH là hình chữ nhật

Trình bày đặc điểm sông ngòi của Châu Á Ngắn gọn, đầy đủ nha!!!

Choose A,B,C or D for each gap in the following sentences

x^3-2x^2+x-xy^2 giải giúp mình nha

Rewrite the sentences so that they have the same meaning with the original ones. 1. how much is a bottle of water? what................. 2. let's dance and sing a song. what about............... 3. the hotel on this street is newer than that hotel. that hotel............... 4. does her school have twenty- three classroom and eight hundred-eighty students? are.......................? 5. what's your brother's weight? how.................

mn giúp mik với. tất cả các câu nha

Xác định cặp chất sau có tồn tại trong dung dịch ko?Giải thích? 1.Na2SO3,HCL 2.K2CO3,H2SO4 3.NaNO3,HCL 4.NaCL,AgNO3 5.BaCL2,K2SO4 6.FeCL2,KOH 7.NaOH,ALCL3 8.K2SO4,NAOH 9.Na2CO3,Ba(OH)2 10.HNO3,Cu(OH)2 1

Ex2: Hãy chuyển các câu sau sang câu điều kiện loại I. 9. I have free time. I go for a walk with you. ->....................................................................... 10. You keep making noise. I punish you. ->.................................................................... 11. You drive fast. You have an accident. ->................................................................... 12. He doesn't stop smoking, he dies of lung cancer. ->....................................................................................... 13. He stays at home, I give her a bar of chocolate. ->.................................................................................... 14. Your English is good. They accept you. ->..................................................................... 15. They don't open the door. The room is very dark. ->........................................................................................ 16. You don't spend too much on shopping. You save a lot of money. ->.................................................................................................................... 17. We pollute the river. We don't have water to use. ->........................................................................................ 18. I show you how to write a book. You try to study. ->....................................................................................... 19. She doesn't hurry. She is late for school. ->........................................................................ 20. You don't take the medicine. Your health is worse. ->.......................................................................................... 21. You do this exercise well. I give you ten good marks. ->............................................................................................. 22. She travels by plane. She is on time for the meeting. ->............................................................................................. 23. He speaks fast. They don't understand him. ->............................................................................... 24. You hang the picture on the wall. The room looks more beautiful. ->..................................................................................................................... 25. You stay up late. You are tired tomorrow. ->.......................................................................... Giúp tui vứi