Cho m(g) X2 tác dụng vừa đủ với kim loại M có hóa trị (I) thu được 8,24g hợp chất A. Cũng m(g) X2 tác dụng hết cới Al tạo ra 7,12g hợp chất B. Nếu cho lượng kim loại M trên tác dụng hết với lưu huỳnh thì tạo ra 3,12g hợp chất C. a, Xác định tên X và M. b, Tìm m.

1.Tính tổng: 1-2+3-4+...99-100 2-4+6-8+...+48-50 -1+3-5+7-...+97-99 1+2-3-4+...+97+98-99-100 2-4+6-8+...+48-50 -1+3-5+7-...+97-99 1+2-3-4+...+97+98-99-100 2.Tính giá trị của biểu thức x+8-x-22 với x=2010 -x-a+12+a,với x=-98;a=99 3. ab+ac=? ab-ac+ad=? ax-bx-cx+dx=? a(b+c)-d(b+c)=? ac-ad+bc-bd=? ax+by+bx+ay=? 4.Điền vào chỗ trống: a)Góc tạo bởi hai tia Om và .......... gọi là góc mOn,kí hiệu ........... b)Góc MNP có đỉnh là......và hai cạnh là......Kí hiệu là............ c)Góc tạo bởi hai tia Ox ; oy 5.Tìm số nguyên x, biết: -12/30=x/-20 x/7=12/21 -5/x-1=2/-10 x-7/4=-15/20

Để đưa các thùng dầu lên xe ôm tô tải , một người đã dùng 4 tấm ván làm mặt phẳng nghiêng . Biết với 4 tấm ván này người đó đã đẩy thùng dầu đi lên các lực lần lượt là : F1 =1000N; F2 =200N ; F3 =500N ;F4 =1200N. Hỏi tấm ván nào dài nhất ? Tại sao?

Để không xảy ra dân chủ quá trớn mất kiểm soát thì cần phải có những yếu tố nào

liked duoi ed B: lived C: watched D: washed

1/2(2x+3)+1/3x=1/12 giải phươngtrinhf sau

VII. Use the given words to write the complete sentences. 1.Vietnamese people / often / clean / decorate / houses / Tet. ………………………………………………………………………………………………… 2.Angel Falls / Venezuela / high / waterfall / the world. ………………………………………………………………………………………………… 3.It / very / interesting / take / boat trip / the Perfume River. ………………………………………………………………………………………………… 4.Which / dry / Sahara Desert / or / Atacama Desert? ………………………………………………………………………………………………… 5.Ha Noi / capital / Viet Nam. It / history / more than 1,000 years. ………………………………………………………………………………………….……… 6.Eat / and / talk / friends / be / most common ways / relax / recess / many countries. ………………………………………………………………………………………………… 7.Could / tell / how / get / police station / please? ………………………………………………………………………………………………… 8.How much / cost / mail / letter / USA? ………………………………………………………………………………………………… 9.What time / Mai / usually / go / school ? ………………………………………………………………………………………………… 10. This exercise / not / so / difficult / that one. ………………………………………………………………………………………………… VIII. Complete the second sentence so that it means the same as the first one. 1.Shall we go to the Japanese Covered Bridge first? Let’s …………………………….…………………………………………..…….…………! 2.No one in the office is cleverer than Mr. Edward. Mr. Edward ………………………………………………………………………..…..……. 3.Travelling abroad for a holiday is much more expensive than travelling in your country. Travelling in your country………………………………………………….………………… 4.She goes to work at eight forty-five. She goes to work at fifteen ………………………..……………….……………..……….. 5.Would you mind telling me the way to the National Museum? Can………………………….………………………………………………………, please? 6.Vietnamese students have fewer vacations than American ones. American students ……………………………….………………..…………..……………… 7.It’s against the rules to use your mobile phone in class. You……………………………………………………………..…………………..…………. 8.We have a two - month summer vacation. Our summer vacation lasts……………………………….………………………………...… 9.It’s a good idea to listen to the weather forecast before going camping. You ……………………………………………..……………………………………………. 10. Nam isn’t so good at English as Minh. Minh ……………………………..than Nam. IX.Read the passage then do the tasks below. Hi! I am Nam. I’m twelve years old. I’m a student in grade 6, class 6A2. I live with my parents and my sister. We live in a small house in the country. This is my school. It is small and old but it is beautiful. In front of the school, there is a big yard. It is clean and there are many tall trees and beautiful flowers. In the afternoon, I often play soccer with my friends there. My school has fifteen classrooms and six hundred students. There are forty-three teachers in my school. They are good teachers. I love them and I love my school very much. a. Answer the questions. 1.Where does Nam live?  ………………………………………………………………………………………………. 2. Are there many tall trees and beautiful flowers in the school yard? …………………………………………………………….…………………………………. 3. How many teachers does his school have? ……………………………………………………………..…………………………………. b. Complete the sentences, using the information from the passage above. 4. ………………….…………………………….…………is small and old but it is beautiful. 5. In the afternoon, Nam often plays soccer with his friends in the ……..…………

Cho hình vuông ABCD , cạnh 6cm . M là trung điểm BC , AC cắt BD tại O , AM cắt BD tại I a) Chứng minh AI = 2IM b) Tính OI Kẻ hình và giải giúp mình với mình đang cần gấp -- Cảm ơn !

BÀI TẬP NGHỈ PHÒNG COVID-19: SỐ 04 Ex 1: Choose the correct answer to fill in the blank 1. - A: Would you like to drink a cup of tea ________ coffee? - B: Coffee, please. A. and B. or C. although D. but 2. My brother plays volleyball well ________ I do not. A. and B. but C. or D. although 3. Most people like watching comedy ________ it'ssxery entertaining. A. because B. so C. although D. but 4. _________ Minh likes sport programmes, he watches this animal programme with his family. A. Because B. Although C. and D. but 5. The film is very interesting. It's both moving ________ funny. A. and B. or C. although D. but 6. I have to go out, ________ I cannot watch television with my family tonight. A. but B. so C. although D. or 7. We decide to go out ________ it's raining heavily. A. though B. so C. because D. but 8. _____ she knows that watching too much TV is a bad habit, she watches less TV than she did before. A. Because B. Although C. or D. but Ex 2: Fill in each blank with one of the conjunctions "and/ or/ but/ so/ because/ although" to complete the sentences. 1. Is her child a boy ……………a girl? 2. I forgot to bring the map, ……………….I got lost. 3. He failed the examination …………………..he didn't study hard. 4. Lien won the match ………………………. she was injured. 5. My new classmate is quite friendly …………………… sociable. 6. I don't like watching films on TV …………………….. I like watching them at the cinema. 7. She likes watching cartoons ………………………….they are colorful and funny. 8. He helps his friends a lot …………………. he is very busy. 9. Lan sings very well …………………..she cannot sing in front of many people. 10. The movie was very boring ……………….. we went out to go shopping. Ex 3: Fill in each blank with a suitable clause to complete the compound sentences. (điền vào chỗ trống một mệnh đề phù hợp A,B, C hoặc D để thành câu ghép) A. because it is bad for your health B. and this programme is on VTV3 C. so you will be fat; because the old one is broken; D. though it's not good for your health; E. but it is broadcast too late 1. You should eat less junk food .................................................................................................................................. 2. I want to watch this programme ............................................................................................................................ 3. My father will buy a new television …………………………………………………………………………………. Ex 4: Fill in each blank with a suitable clause to complete the compound sentences. (điền vào chỗ trống một mệnh đề phù hợp A,B, C hoặc D để thành câu ghép) A. Though his clothes are old B. and don't enter this room C. so TV is a good way to entertain D. Although he is young E. or you can do more exercise F. because it's not good for your eyes 1. ……………………………………………………… they look very clean and of good quality. 2. Don't spend too much time watching TV……………………………………………………… 3. You can eat less, ……………………………………………………………………………..... Ex 5: Rewrite the sentence, using given words below (viết lại câu sử dụng các từ cho sẵn) 1. My sister can swim well. She can't play badminton. (but) …………………………………………………………………………………………………… 2. Hanh goes to that French restaurant every week. She loves French food. (so) …………………………………………………………………………………………………… 3. He was tired last night. He stayed up late to watch a football match. (although) …………………………………………………………………………………………………… 4. I don't like this TV programme. It's so boring. (because) …………………………………………………………………………………………………… 5. My mum went to Hue last month. His mum went to Hue last month, too.(and) …………………………………………………………………………………………………… 6. He was lazy, so he got a bad mark. (“because”) …………………………………………………………………………………………………… 7. It rained hard yesterday. I went to school on time. (“although”) …………………………………………………………………………………………………… 8. Lan is more beautiful than all girls in her class.(most ) …………………………………………………………………………………………………… 9. Daisy has to do her homework. She is very tired . ( “Although”) …………………………………………………………………………………………………… 10. I am interested in the history of television, so I’ve read a lot of books about it. Because………………………………………………………………….………………………… 11. Hien is a careful driver. - Hien drives..................................................................................................................................... 12. No planet in the Solar System is as big as Jupiter. -Jupiter is……………………………………………………………………….………………

Bạn nào tối nay rảnh có thể giúp mình làm lập dàn ý bài văn này được không ạHÃY MIÊU TẢ THÔN XÓM (KHU PHỐ) VÀO MỘT NGÀY MÙA ĐÔNG GIÁ RÉT bạn nào có thể giúp mình tạo thành một lập dàn ý hoàn chỉnh và tốt nhất sau đó mình có thể tự viết một bài văn hoàn chỉnh cảm ơn ạ .