user-avatar
phucan120106
2 năm trước
Viết chữ kiểu (mọi người muốn kiểu gì cũng được miễn là đẹp)"Cỏ Bốn Lá" Trang trí nữa nha Ai đẹp nhất CTLHN 1 pic kí 1 pic k kí Bằng app
Thích Trả lời Chia sẻ

Các câu hỏi liên quan

KHÔNG CẦN GIẢI RA, CHỈ CẦN NHẬN XÉT LỜI GIẢI ĐÚNG HAY SAI MỘT CÁCH TỈ MỈ LÀ ĐƯỢC!!! TỈ MỈ, RÕ RÀNG NHA, CẢM ƠN!!! đề bài: cho tam giác ABC. điểm D chia trong AB theo tỉ số 1:2, Echia trong AC theo tỉ số 2:5 DEgiao BC tại F. Tính BF:FC? GIẢI: Qua B kẻ BK //EC giao EF=K(K thuộc EF); qua B kẻ BM//EF giao AC=M(M thuộc AC). vì tam giác ECF có BM//EF=> FB/FC=EM/EC (theo định lý Ta lét) vì tam giác EFC có BK//EF( giả thiết) =>> FK/EF=FB/FC=KB/EC(hệ quả định lý Ta lét) Vì điểm D chia trong AB theo tỉ số 1:2=>AD/DB=1/2=>AD/AB=AD/(DB+AD)=1/(1+2)=1/3 vì điểm E chia trong AC theo tỉ số 2:5=>AE/EC=2/5=>AE/AC=AE/(EC+AE)=2/(5+2)=2/7 vì tam giác ABM có DE//BM(BM//EF mà D lại thuộc EF) => AD/BD=AE/EM=>>AE/EM=1/2=>FM=2AE (1) vì AE/EC=2/5(giả thiết)=>EC=5AE/2 (2) từ (1) và(2)=> EM/EC=2AE/5AE/2=4/5 vì FB/FC=EM/EC(chứng minh trên)=> FB/FC=4/5

I / Choose the best option A,B,C, or D to complete each of the following sentences(Chọn câu đúng): 1/I’m going away……..........a few days. a.since b.in c.for d.during 2/My friend suggested ......................….by car. a.togo b.go c.going d.goes 3/Cool and burns immediately so as to… tissue damage. a.ease b.relieve c.minimize d.maximize 4/The lane is…... …Nguyen Trai street and Tran Hung Dao street. a.near b.between c.beside d.on 5/.I ..... on a farm when I was a young girl. a.use to living b.use to live c.used to live d.used to living 6/Would you mind………... .the windows. a.to close b.closing c.close d.closed 7/There are flights daily to Ho Chi Minh city…… Monday. a.besides b.after c.except d.on 8/My friend suggested............... ..by car. a.togo b.go c.going d.goes 9/Na………me wave to her. She………… …....in the other direction. a.see/is looking b.didn’t see/was looking c.was seeing/looked d.doesn’t see/looks 10/It’s ….to travel around Vietnam. a.interesting b.interested c.interestingly d.interestedly 11/……… ....you mind if I smoke? a.could b.don’t c.do d.would 12/Milk…… …to the houses by the milkman everyday. a.bring b.is bring c.is brought d.has brought 13/Milk bottles can be…… after being cleaned. a.recycled b.thrown away c.broken d.reused 14/I take part……. most youth activitives of my school. a.of b.on c.to d.in 15/This project…… .next month. a.is carried out b.will carried out c.carries out d.will be carried out 16/There are flights daily to Ho Chi Minh city.......... Monday. a.besides b.after c.except d.on 17/We were looking forward to….you in June. a.seeing b. see c.saw d.be seen 2.His parents are always proud..... ....him . a.about b.of c. on d.with 18/I will come and……… ..at 7 o’clock. a.pick up you b.pick you up c.see up you d.see you up 19/Today I went on …… .tour around Asia. a. a eight hours b.a eight hour c.an eight hours d.an eight hour 20/The teacher…… .a class at eight o’clock yesterday evening. a.is having b.was having c.has d.has had 21/…… ..I was having dinner,my husband was watching TV. a.While b.If c.Because d.As 22/Yesterday Lan went to the market and… some food. a.buy b.have bought c.buyed d.bought 23/Cool and burns immediately so as to....... tissue damage. a.ease b.relieve c.maximize d.minimize 24/How do you ……… ….about the people living here? a.fell b.fall c.feel d.felt 25/How many………………………………......................……… in the last competition? a.activities were there b.activities there were c.activities are there d.activities there are 26/How were the activitives……… .? a.organized b.made c.put d.done 27/The cupboard is open and everything.. a.is broken b.was broken c.has been broken d.would be broken 28/Is Ha Long Bay a… ..Heritage? a.World Natural b.Natural World c.World Cutural d.Cutural World 29/She has...... ...over 30 pages since yesterday. a.writen b.wrote c.written d. write

2018 © Loga - Không Ngừng Sáng Tạo - Bùng Cháy Đam Mê
Loga Team