Mọi người giải nhanh giúp mình nha! Mình sẽ vote 5 sao! Cho ΔABC nhọn nội tiếp (O;R), 3 đường cao AM, BN, CK cắt nhau tại H. AM, BN, CK kéo dài cắt (O) lần lượt tại D, E, F. a) Chứng minh: ΔEAF cân và CA là tia phân giác của ∠ECF. b) Chứng minh: BC là tia phân giác ∠HBD và OA ⊥ EF. c) Kẻ đường kính AS. Tứ giác BHCS và BCDS là hình gì? Vì sao? P/s: Làm câu nào cũng được

Gạch một gạch dưới vế câu, gạch hai gạch dưới cặp quan hệ từ nối các vế trong từng câu ghép dưới đây: a) Không những nó học giỏi môn Toán mà nó còn học giỏi môn Tiếng Việt. b) Chẳng những nước ta bị đế quốc xâm lược mà các nước láng giềng của nước ta cũng bị đế quốc xâm lược. c) Không chỉ gió rét mà trời còn lấm tấm mưa.

1. Hiện nay có một số học sinh học qua loa, đối phó, không học thật sự. Em hãy viết đoạn văn ngắn phân tích bản chất của lối học đối phó để nêu lên những tác hại của nó. 2. Hãy viết đoạn văn tổng hợp những điều đã phân tích trong bài "Bàn về đọc sách"

Phát biểu cảm nghĩ của bạn về công văn sau của Sở GD-ĐT Vũng Tàu: .-. Trời đất ơi tại sao tui không sinh ra và lớn lên ở Vũng Tàu, giờ bài tập Tết ngập đầu ngập cổ tui khổ quá mà :(((((

Mọi người trợ giúp mình bài tập thứ $ 2 $ nằm trong hình ảnh dưới đây nhé $ ! $

31.Children can participate in a TV ………………… for a game show or a quiz show (1 Điểm) A. channel B. competition C. studio D. cartoon 2 32.I have three good friends: Ba, Lan and Hoa. They like sports. Ba likes soccer and tennis; Lan likes badminton; and Hoa likes aerobics. They all like watching soccer on television. Ba often plays soccer in the afternoon with his classmates at the weekend. Lan plays badminton twice a week; and Hoa does aerobics on Thursday and Sunday. Lan and Hoa play sports at the sports club. Lan and Hoa play sports at home. (1 Điểm) T F 33."What is your ………………… . TV programme?" - "It's cartoons" (1 Điểm) A. good B. favourite C. best D. like 34.I have three good friends: Ba, Lan and Hoa. They like sports. Ba likes soccer and tennis; Lan likes badminton; and Hoa likes aerobics. They all like watching soccer on television. Ba often plays soccer in the afternoon with his classmates at the weekend. Lan plays badminton twice a week; and Hoa does aerobics on Thursday and Sunday. Lan and Hoa play sports at the sports club. Hoa does aerobics twice a week. (1 Điểm) T F 35.Are there any good programs ………………… teenagers on TV tonight? (1 Điểm) A. to B. for C. of D. with 36.TV ………………… can join in some game shows through telephone or by mail. (1 Điểm) A. people B. weathermen C. newsreaders D. viewers 37.I have three good friends: Ba, Lan and Hoa. They like sports. Ba likes soccer and tennis; Lan likes badminton; and Hoa likes aerobics. They all like watching soccer on television. Ba often plays soccer in the afternoon with his classmates at the weekend. Lan plays badminton twice a week; and Hoa does aerobics on Thursday and Sunday. Lan and Hoa play sports at the sports club. Ba, Lan and Hoa like the same sports (1 Điểm) T F 38.The film was _________. I felt asleep in the middle. (1 Điểm) a. scary b.boring c.exciting d.entertaining 39._________ television do you watch a day? - About two hours. (1 Điểm) a. How long b.How many c. How much d. How often 40.PHONETICS: "EA" a. news reader b. weather c. eat d. leave (1 Điểm) A B C D 41. VTV is a ………………… television channel in Viet Nam, and it attracts millions of TV viewers in Viet Nam. (1 Điểm) A. wide B. local C. international D. national 42.………………… the news reader on BBC One reads very fast, my brother can hear everything in the news. (1 Điểm) A. But B. Although C. When D. But

Giúp ạ xin các cậu rep ạ tớ vote 5sao nhé

giúp mik với. I )Put the words and phrases in the right order to make meaningful sentences 1, will / Robots / be able to / all the housework / us. / do / instead of/ 2, ever talked / Have / you / of English ? / a native speaker / to 3, most popular / the / Football / in the world ./ is / sport 4, I went / Ha Long Bay / to / with / last summer. / my parents / 5, we / If / more / plant / trees / we / reduce / pollution . / air / will II. Rewrite each of the following sentences in such a way that means exactly the same as the sentence printed before it . 1, He worked hard , so he got a good mark. →Because he .................................................................. 2, Nam is interessted in watching television . →Nam likes 3,The water is polluted .Plants die. →If 4,My brother is a good basketball player. →My brother can 5, It is not good if you exercise too hard and too long . →You should not

3."………………… is the weather forecast programme on?" - "At 7.30 pm every day." (1 Điểm) A. What B. How C. When D. Where 4.PHONETICS: "O" a. programme b. show c. popular d. home (1 Điểm) A B C D 5.Who wants to be a millionaire? is _________ at eight o’clock every Tuesday night. (1 Điểm) a. in b. on c. at d. from 6.Grandma never _________ any episodes of her favourite series. (1 Điểm) a. misses b.watches c. forgets d. has 7."………………… do you like the Modern English programme? " - "Because it helps me with my English." (1 Điểm) A. What B. How C. When D. Why 8.Disney Channel is one of the most ........................ channels children . (1 Điểm) A. good - for B. exciting - of C. popular - to D. popular - for 9.They are busy, ...........................they can't help us (1 Điểm) as so because but 10.I like watching the news _________ I want to know what is happening around the world (1 Điểm) a. and b.so c.but d.because 11.PHONETICS: A a. game b. animal c. channel d. national (1 Điểm) A B C D 12.Could you turn _________ the volume please? I can’t hear that singer very well. (1 Điểm) a. up b. down c. on d. off 13.PHONETICS: "TH" a. theater b. thank c. there d. thirty (1 Điểm) A B C D 14.PHONETICS: CH a. watch b. channel c. children d. schedule (1 Điểm) A B C D 15."………………… is that TV programme directed by?" - "By a famous Vietnamese director." (1 Điểm) A. What B. Where C. How D. Who 16.It’s a fantastic _______. If you answer ten questions correctly, you can win a million pounds (1 Điểm) a. fashion show b. talk show c.gameshow d. reality show 17.Game shows are _________ programmes. They can be both entertaining and educational. (1 Điểm) a. much exciting b. more exciting c. most exciting d. the most exciting 18.My brother wants to become a ………………… to tell TV viewers what the weather is like. (1 Điểm) A. newsreader B. actor C. weatherman D. producer 19.I have three good friends: Ba, Lan and Hoa. They like sports. Ba likes soccer and tennis; Lan likes badminton; and Hoa likes aerobics. They all like watching soccer on television. Ba often plays soccer in the afternoon with his classmates at the weekend. Lan plays badminton twice a week; and Hoa does aerobics on Thursday and Sunday. Lan and Hoa play sports at the sports club. Ba plays soccer every day. (1 Điểm) T F 20.My family enjoys watching game shows …………………. they are very exciting and interesting. (1 Điểm) A. because B. so C. but D. and 21.I have three good friends: Ba, Lan and Hoa. They like sports. Ba likes soccer and tennis; Lan likes badminton; and Hoa likes aerobics. They all like watching soccer on television. Ba often plays soccer in the afternoon with his classmates at the weekend. Lan plays badminton twice a week; and Hoa does aerobics on Thursday and Sunday. Lan and Hoa play sports at the sports club. Lan plays badminton three times a week. (1 Điểm) T F 22.Millions of children around the world enjoy the cartoon because it can both ………………… and …………………a young audience. (1 Điểm) A. entertain - education B. entertainment – education C. entertainment - educate D. entertain - educate 23.The story was very interesting _________ very sad. (1 Điểm) a. and b.or c.so d. but 24._________ does Sam watch the “Muppet Show”? - On every Sunday afternoon (1 Điểm) a. What b. When c. What time d.How often 25.………………… are films by pictures, not real people and often for children. (1 Điểm) A. Documentaries B. Love stories C. Cartoons D. Detective stories 26.My father works late tomorrow, so he will ………………… the first part of the film on VTV1. (1 Điểm) A. miss B. lose C. forget D. cut 27.If you want to know what the weather is like tomorrow, watch the …………………. (1 Điểm) A. weather forecast B. music show C. game show D. quiz show 28.The football match is on at 2 am ,………………… I can't watch it. (1 Điểm) A. so B. although C. but D. then 29.That TV programme is not only interesting ………………… it also teaches children many things about (1 Điểm) A. but B. so C. and D. because 30.Many people with different skills work hard ………………… quality programmes for television. (1 Điểm) A. produce B. to produce C. producing D. to producing

ví dụ về trường hợp có lực tác dụng lên vật có thục hiện công cơ học