Nêu sự khác biệt về kinh tế giữa khu vực Bắc Phi và khu vực Trung Phi

Một số tự nhiên có 2 chữ số.Tỉ số giữa chữ số hàng chục và hàng đơn vị là $\frac{3}{2}$ .Nếu viết thêm chữ số 0 xen vào giữa 2 chữ số của nó thì được số mói lớn hơn số đã cho là 540. Giúp tôi nhé.Xin cảm ơn!

Hùng 8 tuổi. Anh lâm hơn hùng 3 tuổi và hơn bạn duy 4 tuổi. Tính tổng số tuổi của cả ba

Đặt tinh 82,55 : 1,27. 1411,12 : 56,9 2 tấn 35 kg =.............. Tấn 36,9 dm vuông =............. m vuông 21 cm 3 mm = ............ cm

IV. Find the mistake then correct it. 1. The teacher ordered us not open our book until she told us to do so. 2. He is angry about having not been invited to her birthday party. 3. John was upset last night because he had to do too many homework. 4.We wish we have a longer vacation but we don’t 5. He doesn’t have any informations about the departure and arrival time of today’s flights. 6. I wish I didn’t go there for my holiday last year. I didn’t enjoy it. 7. The mother asked her son what did he want for his birthday. 8. Throughout the United States there is fast food restaurants where hamburgers are served. 9. Each of the students in the class has to do their own assignment this semester. 10. Helen was proud for finishing the work in such a short time. V. Fill in each gap one suitable preposition. Dear sir, I saw your advertisement (1)………………. English classes (2)………….. Sunflowers magazine and I am interested (3)…………. coming (4)…………….your Foreign Language Center this summer. I have learnt English (5)…………….. 2 years but I have never been (6)……….. England and I feel that it is now necessary, especially to improve my pronunciation. Could you please send me more information (7)…………. your courses and an application form? I would also like some information about accommodation. I can do your tests (8)………… attending your course if necessary. I look forward (9)…………. hearing (10)………… you as soon as possible. Your faithfully, J.B John. VI. Read the text then choose the best answer to fill in the blanks. LEARNING A SECOND LANGUAGE Some people learn a second language (1)_____. Other people have trouble learning a new language . How can you have (2)_____learn a new language , such as English ? There are several ways to make learning English a little (3)_____and more interesting . The first step is to feel positive about learning English . If you believe that you can learn,you will learn .(4)____patient.You do not to have to understand(5)____all at once . It `s natural to make mistakes when you learn something new . We can learn from our mistakes . The second step is to practice your English. For example , write in a journal, or diary ,every day. You will get used to (6)_____in English , and you will feel comfortable expressing your ideas in English . After several weeks, you will see that your writing is improving .(7)_____,you much speak English every day. You can practice with your classmates (8)_____class. The third step is to keep a record of your language learning . You can write this in your journal . After (9)_____class , think about what you did . Did you answer a question(10)_____? Did you understand something the teacher explained?Perhaps the lesson was difficult , but you tried to understand it . It is important to practice every day and make a record of your achievements . 1. A. ease B. easy C. easily D. all a, b, c. 2. A. itself B. yourself C. himself D. herself 3. A. ease B. easy C. easily D. easier 4. A. Be B. Being C. To be D. Been 5. A. anything B. nothing C. everything D. something 6. A. write B. writing C. to write D. written 7. A. In addition B. Addition C. Additional D. By addition 8. A. of side B. outside C. beside D. byside 9. A. some B. each C. all D. few 10. A. correct B. correction C. correctly D. corrective

xác địch chủ ngữ vị ngữ trong câu sau '' Đứng ở đây nhìn ra xa phong cach thật đep''

Cho đoạn thẳng AB=7 cm.Lấy điểm C thuộc đoạn thẳng AB sao cho AC=2cm . Trên cùng một nửa mặt phẳng bờ AB vẽ 2 tia Ax bà By vùng vuông góc với AB.Lấy điểm D thuộc tia Ax,điểm E thuộc tia By sao cho AD=10cm,BE=1cm a)Tính độ dài các đoạn thẳng DC,CE b)Chứng minh rằng DC vuông góc CE Vẽ Hình luôn nha.Làm cả bài luôn nha

tìm 3 số tự nhiên liên tiếp trong đó số nhỏ là số chẵn và một trong số đó chia hết cho 9, tổng ba số đó là một số có ba chữ số và có các đặc điểm sau: -chia hết cho 5 -tổng các chữ số hàng trăm và hàng đơn vị chia hết cho 9 -chữ số hàng chục là chẵn

which word in each line has the underliner part pronounced diffierently from the others A . Bear B . climB C. emBroider D. symBol giups mik vs mik caanf gaaps

a) tìm Min của B=$\frac{x^2-4x+1}{x^2}$ b) tìm Max và Min của C=$\frac{2x}{x^2+1}$