Cho hình bình hành ABCD Gọi H và K theo thứ tự là chân đường vuông góc kẻ từ A và C đến BD a) CM: AHCK là hình bình hành b) Gọi M là giao điểm của AK và BC gọi N là giao điểm của CH và AD CM: AN=CM c) Gọi O là trung điểm của HK CM:O,M,N thẳng hàng (em mong sẽ có hình ạ :(( )

Exercise 4: Complete the sentence with forms of can/ could/ be able to. 1. She was very strong. She _____________ swim all day and dance all night 2. When I was younger, I _____________ stay up all night and not get tired. 3. I am sorry I _____________ come to the meeting next week. 4. Before he had the car accident, he _____________ run very fast. 5. I _____________ remember his name. I’m sorry. 6. Diana _____________ play the piano very well. Her mother is proud of her. 7. She _____________ come on holiday next month if her parents give her permission. 8. At four years old he _____________ read quite well. 9. They _____________ go. The weather was too bad. 10. A: Can you lend me some money? B: Sorry. I _____________. I haven’t got any either. 11. I told my son that it was too late and he _____________ go to the party. 12. If you continue drinking, you _____________ drive home. 13. He _____________ go to France because he had lost his passport. 14. Fred _____________ speak Russian when he was six years old. 15. When _____________ (you) come tomorrow? Exercise 5: Choose the correct answer A, B, C or D to finish the sentences. 1. Listen! We ............. hear a train in the distance. A. can B. could C. will be able D. were able to 2. I don’t think he ............. win the next competition. A. could B. can’t C. won’t be able to D. will be able to 3. Michael is very proud to ............. play in a jazz-band. A. be able to B. can be able C. will be able to D. could be able 4. When I was five, I ............. swim. A. can not B. could not C. am not able to D. will not be able to 5. I have to go to a meeting tomorrow night so I ......... come to the party. I’m very sorry. A. can’t B. wasn’t able to C. couldn’t D. can’t be able to 6. We ............. go to the party. We’re going to a wedding. A. couldn’t B. won’t be able to C. will can’t D. want be able to 7. A: Can you lend me some money? B: Sorry. I ............. . I haven’t got any either. A. couldn’t B. am not able to C. can’t D. won’t be able to 8. They ............. go. The weather was too bad. A. weren’t able to B. can’t C. won’t be able to D. couldn’t 9. She ............. go on holiday next month if her parents give her permission. A. can’t B. will be able to C. could D. couldn’t 10. The fishing boat sank but luckily all the crew ............. save themselves. A. couldn’t B. will be able to C. were able to D. could 11. Lola ............. run better last year. A. can B. could C. will be able to 12. They ............. train in the gym in two days. A. can B. could C. will be able to 13. We ............. talk about it for a long time. A. can B. could C. will be able to 14. Do you think we ............. park over here? A. can B. could C. will be able to 15. ............. you taste the garlic in this stew? A. can B. could C. will be able to 16. ............. you understand what he said? A. can B. could C. will be able to

Câu 1. Đoạn văn trên nói đề vấn đề gì? Vấn đề đó được diễn đạt bằng cụm từ nào? Cách diễn đạt như vậy có tác dụng gì? Câu 2. Theo tác giả, bệnh lề mề đã gây ra những tác hại nào? Câu 3. Từ đoạn trích trên và những hiểu biết xã hội, viết đoạn văn ( khoảng 2/3 trang giấy) nêu suy nghĩ về ý nghĩa của sự tôn trọng người khác.

cách dùng máy tính tách phương trình bậc nhất 1 ẩn

a) 1/x-y+3xy/y^3-x^3+x-y/x^2+xy+y^2 b) 3/x^2+2xy+y^2+4/2xy-x^2-y^2+5/x^2-y^2

Cần gấp lắm, ai giải giúp. Thấy đáp án có vẻ sai sai. Nhưng không chắc lắm. Ai giải giúp tớ. Tìm kiếm cũng là kết quả đấy.

71 Why does the writer use the example of the flute? A to suggest that musical instruments can be simple B to highlight the fact that music instruments are important C to exemplify that music has existed for thousands of years D to impress the reader with an amazing fact 72 In the second paragraph, what does the writer suggest about music? A it probably evolved as a way for the species to continue B it is more desirable than vital C it is an essential way to bring groups together D it replaces the spoken word 73 In the third paragraph, what reason is given for the increase in young people learning an instrument? A electronic music is easier to play than traditional instruments B young people like electronic music more C there are more resources to help people D young people want to become famous 74 What does ‘this’ (line 19) refer to? A online collaboration B creating potential C making new music D sharing music 75 How does the writer feel about the future of music? A optimistic as long as people have the right instruments B worried that music will become increasingly simpler C concerned that music will only be for the rich D confident that music will always exist mọi người giúp em với ạ, em cảm ơn (lưu ý : đề em chụp trong hình, đọc đề rồi chọn đáp án đúng ạ /phần chọn đáp án ở trên/)

Mik đang cần gấp giúp mik mik cho 5*

Mọi người cho em hỏi " Chính vì thế ....." Vậy chính có phải là trợ từ không ạ ?

Rút gọn các biểu thức sau: $a, \dfrac{5!}{m(m+1)} × \dfrac{(m+1)!}{(m-1)!3!}$ $b, \dfrac{2001!}{2000!-1999!} × \dfrac{1999}{2001} + 0!$