Đáp án : xét tứ giác CAIM có goc A=I=90 độ
=> CA//MI => CAIM là hình thang vuông
Giải thích các bước giải: a ) là hình thang vuông mà nhỉ ? cậu kết hợp câu b vs c nhé
Phương trình phâm li của axit axetic là: CH3COOH <=> CH3COO{-}+H{+} .Kc. Biết [CH3COOH] + 0,5M và ở trạng thái cân bằng [H{+}] = 2,9.10^-3M. Tìm Kc
a. Theo em, những biểu hiện sau đây không tuân thủ phương châm hội thoại nào? Nguyên nhân dẫn đến sự không tuân thủ đó? Nói chuyện riêng trong tiết học; ngắt lời người khác; nói dối; nói dài dòng, rườm rà; nói năng thô tục, khó nghe; vô lễ với người lớn; nói lạc đề; cố tranh cãi nhưng không có lý lẽ; a dua, nịnh bợ; bịa đặt, nói xấu người khác. b. Nhận xét, đánh giá về những biểu hiện trên?
Cần thêm bao nhiêu tấn Fe2O3 vào 1 tấn gang chứa 5% C để sản xuất một loại thép chứa 1% C? Biết rằng C chỉ bị oxi hóa thành CO Trả lời nhanh và chi tiết giúp mik nha
Câu thơ “Những chị lúa phất phơ bím tóc/ Những cậu tre bá vai nhau thì thầm đứng học” có sử dụng biện pháp nghệ thuật nào?
Giúp mik với ạ Các Mod và BĐHH làm gizps ajk Hết nha 60dd
Tuyển Mem luôn một thể ! Cho hình thang ABCD (AB song song CD) có AB<CD, AD=BC=AB, góc BDC= 30 độ. Tính các góc còn lại của hình thang.
Giải hộ e 2 bài này với ạ em cần gấp😽😽
E1: Chọn từ phát khác với các từ còn lại 1. A. brother B. these C. think D. clothes Gạch chân th 2. A. idea B. mind C. time D. win Gạch chân i 3. A. teach B. great C. speak D. beach Gạch chân ea 4. A. lived B. watched C.looked D.stopped Gạch chân ed E2: Khoanh tròn vào A, B, C, D Which one is different? A. boxing B. cycling C. telling D. skiing Giúp vs ạ
REVISION AND EXERCISES Exercise 1. Complete the following sentences by choosing the correct answers. 1. I _____________ to Hanoi before. A. have never been B. was never been C. never be D. am never been 2. Henry and Peter usually ________________ in their playground. A. running B. runs C. run D. ran 3. I believe that team ____________ the competition. A. is going to win B. will win C. wins D. are win 4. My mom __________ shopping while my brother was playing games in the Internet shop. A. goes B. went C. going D. was going 5. We were doing our homework when our dad _________home. A. comes B. was coming C. did come D. came 6. Be quiet! The children ___________ the exam. A. are taking B. take C. takes D. is taking 7. When I was a child, I used ____________ with dolls all day. A. to playing B. to play C. play played 8. Are you hungry? I ____________ the dinner now. A. cooked B. will cook C. am cooking D. is going to cook 9. It’s much cloudy now. It’s __________ soon. A. will rain B. rains C. rained D. is going to rain 10. If you are tired, you __________ to bed right now. A. went B. is going C. should go D. were go 11. My little sister prefers learning English __________ History. A. to learning B. to learn C. than learning D. than learn 12. They get used to __________ in the noise. A. work B. working C. worked D. be work 13. That woman ________ in front of their house for 3 hours. A. is waiting B. was waiting C. waited D. has waited 14. If you work hard, you _____________ a lot of money from this job. A. earns B. are earning C. will earn D. earned 15. She hopes that she ___________ the next exam. A. pass B. will pass C. is going to pass D. passes 16. Marry is always ___________ to school late. A. going B. goes C. went D. go 17. My mom is a teacher. She ___________ in this school since 2002. A. works B. used to work C. has worked D. have worked 18. They ___________ this car 5 years ago. A. buyed B. were buy C. are buying D. bought 19. Lan Anh is __________ in my class. A. more beautiful B. the most beautiful C. the beautifulest D. the more beautiful 20. It takes him 5 hours ____________ how to play this game. A. to learn B. learning C. learned D. learns Exercise 2. Put the verbs in the correct tenses. 1. Lan spends 15 minutes (go)__________ to school everyday. 2. Our English teacher (travel) _______________ to London in 2015. 3. I promise I (finish) _______________ the homework before going to school. 4. My grandmother (live) ___________ here since 1975. 5. I get used (cook) _________________ rice for my breakfast. 6. The workers (have) _________________ lunch at the moment. 7. John (play) _______________the piano in his bedroom every evening. 8. I think they (come) _______________ to Hoi An next week. 9. While he (clean) ______________ his motorbike, his son (eat) ____________cakes. 10. She (read) _______________ that book 4 months ago. 11. Listen! We (fly) _______________ to New York. 12. My best friend used (study) _______________ in Sweeden. 13. I ______ just (move) __________ to Dalat since last week. 14. We (watch) ____________ TV when the phone (ring)_____________. 15. At this time last year, I (visit) __________my cousin in Hue. Exercise 3. Rewrite each of the following sentences so that it has the same meaning with the first sentence. 1. No one in my class is taller than Lan. → Lan is the______________________ 2. It takes John 2 hours to do his housework. → John spends________________________ 3. I have never been to Ha Long bay before. → This is the first time_________________________ 4. At 8.00 pm yesterday, I was reading book. My mom was making cake. → While_______________________________________________________ Exercise 4. Choose and circle the word whose boldfaced part is pronounced differently from that of the others 1. A. out B. round C. about D. would 2. A. chair B. check C. machine D. child 3. A. too B. soon C. good D. food 4. A. though B. enough C. cough D. rough 5. A. happy B. hour C. high D. hotel 6. A. equal B. fashion C. champagne D. match 7. A. only B. cotton C. cross D. economic 8. A. baggy B. minority C. style D. symbol 9. A. thing B. ghost C. clothing D. strong 10. A. casual B. sale C. sleeveless D. slit
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