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Cho góc nhọn a biết cos a=0,6.Khi đó cot a bằng bao nhiêu

a) 300+50+0,08 b) 40+ 9 phần mười + 8 phần một trăm c) 4,9 : 2 + 13,08 d) 17,55 : 3,9 - 1,36 e) 0,603 : 0,09 + 1,8

Cho góc nhọn a biết cos a=0,6.Khi đó cot a bằng bao nhiêu

IV. Choose A, B, C, or D to complete the sentences. Question 14, When I turned up, the town hall was already h as of teenagers. B. packed Question 15. They keep changing the decoration of the shop B. because Question 16. This city has one of the most B. fashionable A. full C. crowded L. E D. jammed they can attract more young people ses A. so that se C. although underground rail networks in the world. C. cosmopolitan his pottery workshop? C. passing down D. when A. efficient Question 17. Do you know who's A. bringing out Question 18. Today's cities are A. lots larger D. fascinated B. taking over D. turning down than cities in the previous time. B. much larger Question 19. This sports centre is so small that it cannot B. face up to D. the largest the demands of local residents. D. set up C. as large A. keep up with Question 20. Japan is the A, most second C. deal about developed country in the world. C. second most B. second in most Juestion 21. Factories and offices should be built in I. coastal D. two most arcas only. Fural C, cultural D. urban

Trình bày biểu hiện và ý nghĩa của tự do lưu thông và sử dụng đồng tiền chung của Châu Âu ?

Cân bằng PTHH theo phương pháp thăng bằng electron, xđịnh chất khử, chất oxh, QTK,QTOXH (1) NH3 + Cl2 --> N2 + HCl (2) Fe + H2S04 --> Fe2(S04)3 + S02 + H20 (3) Mg + HN03 --> Ng(N03)2 + N29 + H20

An nghĩ ra một số.nếu số đó cộng thêm 85 rồi nhân tổng đó với72 thì được kết quả là23328.Tìm số an nghĩ

Câu 11: Vai trò của giống vật nuôi trong chăn nuôi. Mỗi vai trò cho 1 ví dụ.

16. He doesn't like candy. I................. A. don't too B. don't, either C. don't neither D. do so 17. I divided the sweets.....................several boys. A. during B. between C. into D. among 18. He was only ten, but he ate........................his father did. A. as much as B. more that C. much than D. as much than IV/ Điền vào chỗ trống một giới từ phù hợp: (10d) 1. In a game of singles, two players play _______ each other. 2. I’m not very fond ________ detective stories. 3. Margarine is different _______ butter. 4. His parents are very strict ______ him. 5. Many people take part _______ jogging every morning. 6. We’d like a walk instead _______ riding a bike. 7. Ba is very good _______ fixing things. 8. They study and listen to music ______ the same time. 9. _____ literature, we learn about books and write essays. 10. Will you be home _______ dinner tonight? V/ Mỗi câu sau có 01 lỗi sai. Gạch chân và sửa sang phần ghi số: (10đ) 1. Lan plays the violin in the school’s orchestra. ____________ 2. The magazines on this rack is in English. ____________ 3. After the first two lessons we have a twenty- minutes break. ____________ 4. After our vacation in Ha Long Bay we returned to home by bus. ____________ 5. We are happy hearing that you’ve passed the final exams. ____________ 6. How many times in a day do you brush your teeth? ____________ 7. The dirt on vegetables can cause you sick. ____________ 8. She bought some souvernirs from the shop and so was I. ____________ 9. Scientists say that the life started in the ocean. ____________ 10. Indonesia is one of the strongest country in badminton. ____________ Supply the correct tense for the verbs in brackets.(2pts) 1. My mother often (go).....................................to the market every morning but she ( not go)...........................there this morning. 2. When (you/ have).......................................................the last medical check-up? 3. Why ( you/ not take) ...........................................part in the picnic last Sunday? 4. Where ( your teacher/ be)..................................................? - He (explain)..................................................a new lesson in that class. 5. I (pick).....................................................you up at your hotel in half an hour. 6. We can't go out now because it (rain)......................................................... . VI/ Dùng đúng dạng của từ cho trong ngoặc để hoàn thành các câu sau (10đ) 1. Minh plays volleyball very __________ . (skill) 2. Last year Mr. Nam drove more ____________ than he does this year. (dangerous) 3. There are many badminton ____________ nowadays. (compete) 4. I’d like a nice ________ orange. (juice) 5. It’s very ___________ of you to give me a lift. (help) 6. There was a wide ___________ of vegetables on display (select) 7.Look at the ______________ ! what are the about. (advertise) 8. People say that “ ____________ is better than cure” (prevent)