Bài 4: Cho tam giác ABC vuông tại A,đường phân giác BD. Kẻ DE vuông góc BC (E thuộc BC).Trên tia đối của tia AB lấy điểm F sao cho AF = CE Chứng minh: a/ tam giác ABD =tam giác EBD b/BD là đường trung trực của đoạn thẳng AE c/ góc ADF = góc EDC và E,D, F thẳng hàng giúp em câu c thôi ạ em cảm ơn ạ!! =)) adf thg hg

Oxit kim loại M có công thức MxOy và có mX:mO=7:3. Tìm công thức oxit

các bạn ơi giúp mik vs cách để chụp ảnh trên máy tính Hoặc làm thế nào để liên kết hình ảnh với điện thoại cũng đc. Giúp mik vs đi các bn

30/ Quân Thanh có cớ xâm lược nước ta vì A. Hành động cầu cứu hèn hạ của vua Lê Chiêu thống B. Vốn đã có âm mư xâm lược nước ta nên nhà Thanh nhận lời cầu viện của Lê Chiêu Thống để tiếng quân sang xâm lược C. Nguyễn Ánh sang nhà Thanh cầu viện. D. Tất cả các đáp án trên đều đúng

Em không làm đc ạ nhờ mọi người giải ạ

Vận tốc của một con thuyền trên mặt nước yên lặng là 20, 4km /giờ, vận tốc của dòng nước là 1, 9km /giờ. Nếu con thuyền đó đi ngược dòng thì sau bao lâu nó đi được 46, 25km ?

31.What would Tom like……………in the morning? A.eat B.ate C.to eat D.eats 32.How much rice do you eat a day?................... A.I eat two bowls of rice B.I eat two bowl of rice C.I eat two rice D.I eat two rice 33.What would you like ………………..? I’d like two bananas A.to swim B.to eat C.to drink D.to sit 34.A,exciting B.attractive C.beautiful D.interesting 35.place /Which/ like/ to /Dalat / would/ or Danang/ visit /your / father/ ? A.Which place your father would like to visit Dalat or Danang? B.Which place your father would like to visit or Danag Dalat? C.Which place would your father like to visit Dalat or Danang? D.Which would like your visit place Dalat or Danang father to ? 36. Lan lives__________20 Nguyen Tat Thanh Street. A. on B. at C. to D. in 37.What …………..the weather be like tomorrow ? It’ll be cold and foggy A.is B.will C.were D. was 38.Sydney./ than /is /HaLong City/beautiful/more/ A.Ha Long City is beautiful more than Sydney. B.Ha Long City is more beautiful than Sydney C.Sydney is more beautiful than Ha Long City. D.Sydney is beautiful than more Ha Long city. 39. My name is Tung. Last weekend, Ivisited Dam Sen Park. It is a beautiful park. It is not far from the centre of Ho Chi Minh city. Where did he visited last weekend? ……………………….. A.He visited DamSen Park B.He visited Thu Le zoo C.He visit Dam Sen Park D.He visits Dam Sen Park. 40. The pharmacy is between the bookshop……………..the supermarket. A.on B.and C,to D.opposite 41.………….sausages do you eat a day? I eat two sausages A.How much B.How many C.How old D.How far 42. What do you think of Nhat Tan bridge ? It’s …………… than I expected A.longer B.more long C.longs D.more longer 43.The pharmacy is ………………to the bookshop A.near B.next C.on D.opposite 44. She …… doing aerobics now. A. are B. does C. is D. has 45.Lan: “…… are you doing, Mai?” – Mai: “I’m reading books.” A. What B. Who C. Which D. When 46.Mr Anh: “…… sports do you play, Binh?” – “Binh: I play soccer.” A. Where B. Who C. Which D. When 47.What do you do in your …… time? A. home B. busy C. good D. free 48.“How …… do you go swimming?” – Mai: “Once a week.” A. many B. much C. old D. often 49.Thu’s brother plays tennis three …… a week. A. time B. day C. times D. hour 50.My students sometimes …… their kites. A. play B. fly C. flys D. run 51“…… does Jack often do on Saturdays?” – “He often goes fishing.” A. When. B. Why C. Where D. What 52.How …… seasons are there in a year? A. much B. many C. long D. often 53.George …… before he goes to school. A. usually is swimming B. is usually swimming C. usually swims D. swims usually 54.It’s …… in the summer. A. cold B. hot C. cool D. warm 55.It’s cold in the …… A. Summer B. Winter C. Fall D. Spring 56.Ba goes …… when it’s hot. A. swim B. swims C. swimming D. to the swim 57.An: “What do you …… when it’s hot?” – “Ha: I go swimming.” A. do B. does C. doing D. don’t 58.What do you do …… the Spring? A. on B. in C. at D. of 59.There are four …… in a year. A. Spring B.Summer C. seasons D.Winter 60…… you going to visit Hue this summer? A. Do B. Does C Are D. Is

4. Look! the bus.............. A. come B.is coming C. to come D. comes 5. My family likes...............our summer holiday at seaside. A. to spend B. spent C. spending D. spend 6. I................on TRAN PHU street. A. living B. live C. lived D. lives 7. Listen! ............they..........in the classroom? A. is/ singing B. are/sing C.are/ singing D. is/ sing 8. What do you usually.............for breakfast.? A. have B. had C. has D. to have. 9. My sister sometimes helps my mother to do the....................... A. housework B. homework C. cooking D. cleaning house. 10. We have some new..............in this school year: physic, computer studies. A. friend B. subjects C. teachers D. maths 11What___________you__________ next weekend? A. do/ do B. are/ do C. did/ do D. are/ going to do 12.Where is Tony from? ~ He is from____________. A. Vietnamese B. American C. Singapore D. Singaporean 13.YesterdayJohn________ go to school because he__________ a toothache. A. didn’t/ had B. doesn’t/ has C. didn’t/ has D. doesn’t/ had 14.I sometimes go___________ in the winter. A. ski B. skiing C. to ski D. to skiing 15.___________ are you going this summer holiday? - I’m going to Paris. A. How B. What C. Where D. Who 16.We want to have agood time___________Hanoi. A. on B. at C. for D. in 17.Hoa___________ a letter to her pen friend now. A. is writeing B. is writing C. writes D. wrote 18.It takes about thirty hours_________________ from Hanoi to Ho Chi Minh City. A. to fly B. flying C. fly D. to flying 19.___________ is it from Hanoi to Hue? ~ About 900 kilometers. A. How old B. How C. How far D. How many 20. There are four______________ in my country: spring, summer, autumn and winter. A. season B. seasons C. people D. students 21.A.Noodles B.Theater C.Stadium D.museum 22.……………..milk do you drink? I drink two glasses. A.How much B.How old C.How many D.How far 23.What will the weather ……………tomorrow? It will be hot. A.be like B.like C.likes D.liked 24.Which place would you like to visit Hoa Lu temple ……..Bai Dinh pagoda? A.or B.and C.of D.on 25. What do you think of Ha Long bay? It’s …………………..than I expected. A.more beautiful B.beautiful C.beautifuler .D.beautifulor 26. What do you think of Sapa? It’s …………… than I expected A.bigger B.more bigger C. big D.more bigChoose the best answer A, B, C or D 27………………………..seasons are there in your country? There are four A.How much B.How many C.How far D.How long 28. My brotheris the__________ in my family. A. more intelligent B. intelligent C. most intelligent D. less intelligent 29. How can I get to Hanoi City?............................................ A.I can take by train. B.I can go by a train. CYou can take a bus. D.You can take by bus. 30. A________ works on the farm. A. teacher B. doctor C. farmer D. journalist

Các công thức của đoạn mạch nối tiếp và song song của hiệu điện thế Các công thức của đoạn mạch nối tiếp và song song của cường độ dòng điện làm hộ mình nha

Để tạo thư mục mới em nháy chuột phải tại màn hình và chọn A New/Shortcut B New/Folder C New/Bitmap