Biết bán kính hình tròn tâm O là 6cm, bán kính hình tròn của tâm I là 4cm.Tính chú vi tứ giác AIBO

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Choose A, B, C, D to complete the sentence 1. I got really ____________ when I saw the main character being killed. A. frightened B. amused C. interested D. confused 2. Twelve Years a Slave is based ______ a true story of Solomon Northup. A. by B. of C. in D. on 3. Critic say Midnight Run is a must –see ___________ it is funny and exciting. A. even though B. because C. however D. in spite of 4. Vin Diesel _________ in many action films, including The Fast and Furious series. A. act B. starred C. directed D. produced 5. Not many people went to see the film; , it received good reviews from critics. A. nevertheless B. although C. therefore D. despite 6. Last night, I didn’t go to bed early being very tired. A. despite of B. because of C. although D. in spite of 7. ________ dangerous sports is very exciting. A. To do B. Do C. Doing D. Done 8. She often makes excuses to avoid _______ her homework. A. to do B. doing C. do D. have done 9. I tried _______ the match but I couldn’t. A. winning B. win C. to win D. to have won 10. I got a ring _____ for Jennie’s birthday. A. made B. to make C. make D. making 11. Kite surfing has really _______ . A. caught on B. joined in C. signed up D. went on 12. They’re building some new tennis _____ in town. A. courts B. pitches C. tracks D. courses 13. I have a passion ____web design. A. on B. for C. with D. of 14. If we ______ this match, we’ll be top of the league. A. win B. tackle C. defend D. sprint 15. Whatever I do, I want to do it to the highest _______. A. rehearsal B. standard C. attraction D. celebration Write the correct form of the words in brackets 16. My time spent in the library was very _______________. (product) 17. She trained in painting and _______________ at Columbia University. (sculpt) 18. Steve Cropper is my favourite _______________of all time. (guitar)

Anh/Chị check ngữ pháp hộ em với ạ, em cảm ơn nhiều!!! I think it is true that in almost every country today each household and family produces a large amount of waste every week. Most of this rubbish comes from the packaging from the things we buy, such as processed food. But even if we buy fresh food without packaging, we still produce rubbish from the plastic bags used everywhere to carry shopping home. The reason why we have so much packaging is that we consume so much more on a daily basis than families did in the past. Convenience is also very important in modern life, so we buy packaging or canned food that can be transported from long distances and stored until we need it, first in the supermarket, and then at home. However, I think the amount of waste produce is also a result of our tendency to use something once and throw it away. We forget that even the cheapest plastic bag has used up valuable resources and energy to produce. We also forget that it is a source of pollution and difficult to dispose of. I think, therefore, that governments need to raise this awareness in the general public. Children can be educated about environmental issues at school, but adults need to take action. Governments can encourage such action by putting taxes on packaging, such as plastic bags, by providing recycling services and by thing households and shops that do not attempt tp recycle their waste. With the political will, such measures could really reduce the amount of rubbish we produce. Certainly nobody wants to see our resources used up and our planet poisoned by waste.

Một ống tiêm chứa đầy nước có đường kính Pít-tông là 2 cm, đường kính của mũi kim tiêm là 0,5mm. Khi ấn vào pít tông thì nước phụt ra với vận tốc 20 m / s. a) Chú ý lượng nước không chịu nén. Hỏi tốc độ dịch chuyển của Pít tông bằng bao nhiêu? b) Độ thay đổi động lượng của lượng nước khi chảy từ pít tông vào mũi kim tiêm trong thời gian 1s bằng bao nhiêu? Biết khối lượng riêng của nước là p = 1000kg/m^3

Bài 3. Cho đường tròn tâm O đường kính AB. Vẽ hai dây AM và BN song song với nhau sao cho sđcung BM <900. Vẽ dây MD song song với AB. Dây DN cắt AB tại E. Từ E vẽ một đường thẳng song song với AM cắt đường thẳng DM tại C. Chứng minh: a) AB  DN b) BC là tiếp tuyến của đường tròn (O).

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