Câu 50đ nha mn,giúp mình với,hứa vote 5 sao và ctrlhn!!

Các hệ đếm thường dùng trong tin học A) hệ thập phân, hệ cơ số 16 B) hệ nhị phân, hệ hexa C) hệ cơ số 2 , hệ cơ số 10 D) hệ la mã , hệ thập phân

dàn ý mở bài Câu cá mùa thu ko liên quan đến tác giả

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

Viết 1 đoạn văn nói về cuộc sống ở nông thôn. (Không được chép mạng, chép mạng = báo cáo)

Cho hình thang ABCD (AB//CD) có độ dài các đáy là a và b (a>b) . Các góc kề với đáy lớn bằng 30° và 45° . Hãy tính diện tích tứ giác ABCD theo a và b Ai đúng mình vote 5 sao

Cảm ơn mẹ vì luôn bên con Lúc đau buồn và khi sóng gió Giữa giông tố cuộc đời Vòng tay mẹ chở che khẽ vỗ về. Bỗng thấy lòng nhẹ nhàng bình yên Mẹ dành hết tuổi xuân vì con Mẹ dành những chăm lo tháng ngày Mẹ dành bao hi sinh để con chạm lấy ước mơ. Mẹ là ánh sáng của đời con Là vầng trăng khi con lạc lối Dẫu đi trọn cả một kiếp người Cũng chẳng hết mấy lời mẹ ru… Câu 3: Trong khổ thơ thứ hai xuất hiện biện pháp tu từ gì? nêu tác dụng của phép tu từ đó. Câu 4: Từ đoạn thơ trên, viết một đoạn văn nêu suy nghĩ của em về tình mẹ (từ 5 câu đến 7 câu) (nhanh giúp mik vs ạ, mik cảm ơn)

căn x + căn y/căn x - căn y+ căn x - căny/ căn x + căn y-4y/x-y

Cho tam giác ABC vuông tại A , đường cao AH . Gọi E,F là hình chiếu của H trên AB,AC : a, Cho AB=6cm , AC=8cm . Tính AH b, Chứng minh $\frac{AB^2}{AC^2}$ = $\frac{HB}{CH}$ c, chứng minh: BC.BE.CF=AH$^{3}$

❤Giải thích bằng lời văn các câu này giúp em với ạ ! Em cảm ơn ❤