Trên AB lấy C sao cho AC>CB,cùng nửa mặt phẳng bờ AB lấy D,C sao cho tam giác ACD,tam giác BEC là các tam giác đều. Gọi M, N, P, Q lần lượt là trung điểm AE, CD, DB, CE a, tứ giác MNPQ là hình gì? Vì sao? b, chứng minh MP=1/2 DE

E hỏi bài này với ạ , e đang học đến phần pt lượng giác cơ bản ạ

Viết một đoạn văn về vũ nương là 1 người phụ nữ trọng nhân phẩm và tình nghĩa

Viết một đoạn văn văn về người bạn của em trong đó có biện pháp nói giảm và nói quá từ 7 đến 10 câu

Giúp với ạ!!!!!!!!!!!CẦn gấp!!!!!!!!!!!1

Nêu cách nhận biết và sản xuất các axit. Viết các phương trình minh họa giúp e trước 9h e vote 5 sao ạ

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Giúp em ạ em xin cám ơn mọi người nhiều.

Exercise 11 : Choose the best word or phrase to complete in the following questions. Question 1 : She passed her examination because she_____very hard. A. studied B. was studying C. had been studying D. studies Question 2 : You_____out last night or were you tired? A. Did - went B. Had - gone C. Did - go D. Had - been going Question 3 : This time yesterday I_____tennis with my classmates. A. played B. was playing C. had played D. would play Question 4 : Nicole_____television a lot when she_____sick last year. A. watched - was B. had watched - had been C. was watching - was D. had been watching - was Question 5 : Mary_____home when she met Dave. A. came B. had come C. had been coming D. was coming Question 6 : The doorbell_____while I_____a shower. A. was ringing - took B. rang - was taking C. had rung - took D. had been ringing - took Question 7 : When I was young, I_____to be a pilot. A. wanted B. had wanted C. would want D. wants Question 8 : The war_____out three years ago. A. was breaking B. had broken C. broke D. have been breaking Question 9 : When he was young, he_____in the army. A. had been serving B. serves C. have served D. served Question 10 : She often goes to school by bike but yesterday she_____by bus. A. travelled B. have been travelling C. had travelled D. travels Question 11 : He_____a cup of coffee every morning many years ago. A. have been drinking B. drank C. had drunk D. was drinking Question 12 : Yesterday she_____to pay me for my helping her but I didn’t accept. A. will offer B. was offering C. had offered D. offered Question 13 : There_____a lot of grass in the garden last summer. A. had been B. were C. have been D. will be Question 14 : It’s time we_____something to help him. A. will do B. had done C. did D. was doing Question 15 : Mr Brown_____in Paris when the Second World War broke out. A. lived B. was_____living C. had lived D. will live Question 16 : I and my mom_____comic at this time last night. A. read B. had been reading C. have read D. were reading Question 17 : At lO.pm last night, my younger brother_____games online. A. had been playing B. was playing C. will be playing D. have been playing Question 18 : People_____all trees along the streets at this time two years ago. A. are planting B. will have been planting C. were planting D. will be planting Question 19 : She_____her homework at this time yesterday morning? A. Was-doing B. Had - been doing C. Do-do D. Will - be doing Question 20 : They_____dinner when we_____. A. had - was coming B. had had - came C. come - will be coming D. were having - came Question 21 : At 8.am yesterday they_____dinner while we_____TV. A. will be having - will be watching B. were having - were watching C. are having - are watching D. will have had - will have watched Question 22 : When I went out, the sun_____. A. will be shining B. is shining C. was shining D. had been shining Question 23 : We_____to the station when it_____to rain. A. were walking - began B. had been walking - began C. have been walking - begins D. will be walking - begin Question 24 : The servant dropped two cups while she_____up last night. A. is washing B. had been washing C. have been washing D. was washing Question 25 : Almost everybody_____by the time we arrived. A. have been leaving B. had left C. was leaving D. have left Question 26 : The secretary_____until she_____her work. A. hadn’t left - finish B. don’t leave - had finished C. didn’t leave - had finished D. wasn’t leaving - finished Question 27 : The teacher asked the boy why he_____his homework. A. have done B. did C. have been doing D. hadn’t done Question 28 : She_____the letter when she_____she_____it to the wrong address. A. posted - had realized - sent B. had posted - realized - had sent C. was posting - realized - had sent D. have posted - had realized - had sent Question 29 : Hardly_____a mile when it had a flat tyre. A. had the car gone B. did the car go C. had the car go D. do the car go Question 30 : The weather_____far worse than we_____. A. is - have expected B. was - was expected C. was - have been expecting D. was - had expected

chu vi hình chữ nhật 48 cm chiều dài gấp 3 lần chiều rộng Tính diện tích hình chữ nhật là a) 96 B 108 C 144 D 180