Cho tam giác MNP cân tại M, các đường cao NI và PK cắt nhau tại H a) Chứng minh tam giác MIN = tam giác MKP b) Chứng minh tam giác HNP cân, so sánh HN và HI c) Gọi E, F lần lượt là trung điểm của HP , HN. Gọi O là giao điểm của NE và PF. Chứng minh rằng 3 điểm M, H, O thẳng hàng Giúp mình nha bài khó quá?

cho A=1/2 ²+1/4 ²+1/6 ²+1/8 ²+...+1/20 ² chứng tỏ rằng A<1/2 mk đang cần gấp nên ai làm đc mk sẽ vote 5 sao ngay

Giúp mình câu d thôi nha Cả bài là 40đ nhưng mà giúp một câu thôi là 10đ mn giúp mình nhé

VIRUT EBOLA LÀ GÌ TẠI SAO NÓ LẠI NGUY HIỂM ĐẾN VẬY ?

Hộ e câu này với ạ e , e cám ơn nhiều

Giải mãi k ra mấy a ơiii)) giúp em với ạh

Chứng minh sinh vật Việt Nam có giá trị về các mặt phát triển kinh tế xã hội, du lịch, bảo vệ môi trường sinh thái

Giải thích biện pháp gây vô sinh để diệt sinh vật gây hại

III Give the correct form of the following verbs: l . That room (paint) .................................... at this time next week. 2. He wouldn’t be ill if he (smoke) ....................................... a lot. 3. By the time the police (come) ...................... , the thief (leave) ......................... yesterday 4. After I (finish) ....................... the lesson, Lan went out. 5.I (watch) ........................... a science fiction film on TV at 9 .00 tonight. 6. Our teacher says that new technology (make) ...................... many workers jobless in the future. 7.Look at those clouds-I think it (rain) ........................ 8. People say that technology (change) ............ up entire rooms are small enough to put on destops and into wristwatches. 9. We’ll need (call) ..................... him more often. 10. This time next week , I (lie) .......................... on the beach on Phu quoc Island. 11. Thomas Edison said that none of his inventions (come) ................... by accident. 12. My students choose (take) ....................... the bus to school every day. 13. ........ Lan (learn) ............. English for 2 years ? No, he ( learn) ...................... for 3 years. 14.If people (travel) ............................. to work by bus, there will be fewer car fumes. 15.There isn’t a garden at house. If there were, we (grow) ............................ vegetables. IV. Give the confrect form of the words in the brevckets’. 1. Recent ...................... developments have made robots more user-ftiendly and intelligent.(science) 2. In some English speaking countries, turkey and pudding are ............. food at Christmas. (tradition) 3. The street doesn’t look ........................... because it has a lot of rubbish. (attract) 4. If we use water ........................... , more people will have fresh water. (care) 5. The polluted water results in the ........................... of many aquatic animals. (die) 6. Internet is one of the most .................................... of the modern world. (invent) V. We are all slowly destroying the eaith. The seas and the rivers are too dirty ( 1) ....... There is so much smoke in the air that it is unhealthy to live in (2) ........ the world’s cities. In one well-known city, for example. poisonous gases from cars (3) ......... the air so much that traffic policemen have (4) ......... oxygen masks. We have cut down so many trees that (5) ............ now vast areas of wasteland all over the world. As a result, farmers in parts of Africa cannot grow enough to eat. 1. A. to swim B. swimming C. swimming in D. to swim in 2. A. many of B. many C. few of D. few 3. A. polluting B. pollute C. polluted D. pollution 4. A. worn B. wear C. to wear D. been wearing 5. A. there are B. they are C. there is D. it is VI. Because'of the Internet, people from all over the world can now be fn'ends even if they never meet. Michel and Kenjl are onlme fnends. They tell us how they use their computers. Michelle, 15, New York, USA "When I’m doing a school project, I use my computer to go online and search the Internet for information. Then I write the Project on the computer. Right now I ’m doing one on the Brazilian rainforest. If I find some good Photos, I ’ll include them. And, of course, I use my computer to stay in touch with friends like Kenji" Kenji, 14, Manchester, UK "I ’m on my computer from eight until ten o’clock every evening. I use it to chat to Michelle, play games, check the latest football news and to chat about my favourite team, Manchester City. If they win the match this Saturday, I ’ll be really happy. Unfortunately, Michelle is a Manchester United supporter!" 1. Michelle and Kenji are......... A. brother and sister B. friends C. brothers D. sisters 2. They....... A. meet very regulaly. B. haven’t met yet. C. have met once or twice. D.met last week 3. Michelle talks to Kenji . A. online B. on her mobile phone C. face to face D. in Michelle’s house 4. All of the following are true about Michelle except A. takes her own photos B.finds photos on the Internet. C. use her computer to do a school project D.Search the Internet for information 5. Kenji does some things online . A.every morning B. every night C. every day D.every aftenoon 6. Which following statement is NOT true about Michelle and Kenji? A. They use computer to keep in touch with their fn'ends B. They are at the same class. C.they chat about football online D. Both of them like football. Mấy bạn giúp mình với ạ :(( Tiếng anh khó quá

QUESTION 1 complete THE text WICH the box IN THE correct form . maybe some verbs can be used more than once. [ go listen play watch ] rick has a lot of hobbies. he (1) ________________CHESS AT SCHOOL AND HE ALSO (2) _______________SKATING . AFTER DINNER , HE (3) __________________for a walk and he (4) _____________to music every evening in his room .rick loves sports . he (5)__________________athletics at school , and he (6)_______________football after school . on saturdays ,rick and his friends (7) __________________swimming . on sundays , they (8) ____________________basketball.