a,xét tam giác ABC và tam giác HBA, ta có:
góc H = góc A = 90 độ
góc B chung
=>tam giác ABC ~ tam giác HBA ( g-g)=>AB/ BH=BC/ AB
=>AB^2 = BC.BH
ai thi VMO ko giúp em câu tuyển học sinh thi IMO em ko tìm đc đáp án
-Can you play a football hay Can you play fooball ms đúng -Can you a daw hay Can you daw ms đúng -Can you play fly a kite hay Can you play a fly a kike hay Can you fly a kike md đúng -Can you play a badminton hay Can you play badminton ms đúng - -Can you Paint hay Can you play a Paint ms đúng -
Vẽ nhóm BFF 5 người (1 người tọc ngắn xoăn, 4 người tóc dài) Yêu cầu: Vẽ có tâm xíu
Anh chị hộ e với ạ e đang cần gấp
1. She _____ to be a ballet dancer when she _____ up. A) go / grow B) going / grows C) goes / grows D)’s going / grows 2. We _____ to stay in a villa in France this summer. A) going B) ‘re going C) to go D) go 3. I’m going _____ Peter tonight. A) see B) seeing C) to see D) saw 4. Careful! The glass is _____ fall. A) going B) going to C) goes to D) go to 5. We _____ to Paris this weekend. A) going B) go C) ‘re going D) to go 6. I’m saving my money _____ a CD player. A) buying B) to buy C) buy D) bought 7. We’re going to Paris _____ a holiday. A) to have B) have C) having D) had 8. They _____ both _____ to become TV stars. A) are / go B) are / going to C) is / going D) are / going 9. What’s she going _____ ? A) do B) doing C) to do D) did 10. She wants _____ in Paris and Moscow. A) dancing B) dance C) is dancing D) to dance 11. They _____ going _____ a car this year. A) aren’t / get B) aren’t / getting C) aren’t / to get D) aren’t / got 12. She _____ traveled to most parts of the world. A) have B) is C) has D) will 13. _____ you ever _____ in a car accident? A) Has / been B) Have / been C) Have / be D) Have / was 14. She _____ to Russia two years ago. A) go B) went C) gone D) goes 15. “_____ you _____ to Russia.” - “Yes, I _____ .” A) Had / be / haven’t C) Have / be / have B) Has / been / have D) Have / been / have 16. Have you _____ your homework? A) do B) to do C) done D) did 17. I haven’t done it _____ . A) yet B) already C) just D) since 18. I’ve _____ the latest Star Wars film. I _____ it last week. A) seen / saw B) see / saw C) seen / seen D) saw / saw 19. She’s _____ the letter. She _____ it yesterday. A) wrote / wrote B) written / written C) wrote / written D) written / wrote 20. They’ve _____ lunch. They _____ it at 12 o’clock. A) have / had B) had / have C) had / having D) had / had
đỐT CHÁY M GAM CHẤT X CẦN DÙNG 6,4 G KHÍ O2 THU ĐƯỢC 4,4 GAM CO2 VÀ 3,6 GAM H20 A.VIẾT SƠ ĐỒ PHẢN ỨNG XẢY RA B.TÍNH KHỐI LƯỢNG M?
I. Complete the following sentences with will or won'tand a verb from the box buy phone take invite meet offer live end use chat
Mik cần siêu gấp và các bn nhớ Giải Thích tại sao nha, cảm ơn trc ạ! Supply the correct form of the verbs in brackets. 1. You can’texpect (preserve).................... the man- made wonders without taking action. 2: I imagine (go) .................... back to the 20th century and (witness) ....................the construction of Cu Chi Tunnels. 3:We recommend (book) .................... early, as this is a popular event. 4:Youngsters nowadays seem (lack) awareness of protecting the public places. 5:A lot of small towns in the area are definitely worth (visit) ..................... 6:I suggested (put) .................... the matter of restoring Ben Thanh Market to the committee. 7:On the way to Hue, we stopped (pay) .................... a visit to a relative in Da Nang
cho 11,7 g natri clorua NACL tác dụng với 334 g bạc nitrat AGNO3 thu được 17 gam natri nitrat NANO3 và bạc clorua agCL a.vIẾT PTHH CỦA PHẢN ỨNG B.TÍNH KHỐI LƯỢNG AGCL TẠO THÀNH
$\text{a) Tìm chữ số tận cùng của M = }$ $4^{1}$ + $4^{2}$ + $4^{3}$ + $4^{4}$ + ... + + $4^{2012}$ + $4^{2013}$ $\text{b) Tìm số tự nhiên nhỏ nhất khi chia cho 3; 4; 5 có số dư lần lượt là 1; 3; 1.}$
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