Gọi M là trung điểm của đoạn thẳng BC . Trên đường thẳng vuông góc với BC kẻ từ M lấy điểm A ( A khác M) . Chứng minh rằng Ab=ac Giúp mik với hứa trả lời đầy đủ chi tiết + vẽ hình vote 5* +tlhn

Mn giúp mình đề này đi . Minh cảm ơn trc nhé

Câu 2: Xác định tính chất của đề bài sau và tìm hiểu đề, lập dàn ý cho đề bài đó: Có ý kiến cho rằng: Cần cù bù thông minh. (Làm dài chút ạ.Mn ơi mk đang gấp gấp gấppp lắm ạ Mong mn giúp với.Nếu hay mk sẽ vote 5s và chọn CTLHN nha.Cảm ơn mn trc nha)

Các chuyên gia tiếng anhgiups em vs ạ Question 1. Scientists have recently argued that Einstein’s contributions to Physics and Mathematics are less important than Newton’s. A: at once B: just now C: before D: shortly Question 2. Our life will be better because of new inventions. (make) A: New inventions will make our life better. B: New inventions will keep our life better. C: New inventions will turn our life better. D: New inventions will do our life better. Choose the best answer A, B, C or D to complete the sentence. Question 3: Neil Armstrong, the first man to walk on the moon, is one of the greatest _____. A: exploration B: explore C: exploring D: explorers Question4 Paul: “Good morning, could I speak to Mr. David, please?”. Tom: “__________” A: Certainly. Would two o’clock be OK. B: He’s in a meeting. Can I take a message? C: Probably by Monday next week. D: I’ll have to ask the person you want to ring first. Question 5 :(20) Professor, Academician Tran Dai Nghia is a (17) ______ scientist of Vietnamese intellectuals. In 1935, the young man Pham Quang Le, his real name, had a scholarship (18) ______ in France. He tried to take 6 college degrees and certificates of the most famous universities of France. Unlike the others, Pham Quang Le had a clear purpose when studying abroad. He studied the science (19) ______ making weapons to serve the country"s independence. The meeting between him and President Ho Chi Minh in Paris in 1946 changed the life of Pham Quang Le. In 1946, under the requirements of the (20) ______, he was assigned as Head of Military Department by Uncle Ho with the (21) ______ for researching, manufacturing weapons for our soldiers to fight the enemy. Uncle Ho said, “This is the good thing, so from now on your name is Tran Dai Nghia...” A: war France B: France war C: French war D: war French Question 6. Developments in science and technology are greatly changing the way we live. (being) A: The way we live is being greatly changed by developments in science and technology. B: The way we live is greatly changed by developments in science and technology. C: The way we live is greatly changing by developments in science and technology. D: The way we live are being greatly changed by developments in science and technology. Question 7: Air pollution, together with littering has _______many problems in our big cities today. A: caused B: affected C: bought D: made Question 8 “Would you pick the kids up from school this afternoon?” “__________” A: Sure B: I don’t think so. C: Really? D: No, I am afraid I can’t. Question 9: He said he hadn’t finished the project ______. A: yesterday B: last week C: previous week D: the previous week Question 10: Are all type of pollution harmful ______the health of humans and animals? A: to B: of C: for D: with Question 11. Nick: “ I like watching films on science and technology.” (said) A: Nick said that he likes watching films on science and technology. B: Nick said that he had liked watching films on science and technology. C: Nick said that he would like watching films on science and technology. D: Nick said that he liked watching films on science and technology. Question 12: Water pollution in the lake has made the fish _______. A: to die B: die C: died D: dying Question 13. It’s no good being impatient with small children. (should) A: We ought to be patient with small children. B: We must be patient with small children. C: We should be patient with small children. D: We have to be patient with small children. Question14: (17) Professor, Academician Tran Dai Nghia is a (17) ______ scientist of Vietnamese intellectuals. In 1935, the young man Pham Quang Le, his real name, had a scholarship (18) ______ in France. He tried to take 6 college degrees and certificates of the most famous universities of France. Unlike the others, Pham Quang Le had a clear purpose when studying abroad. He studied the science (19) ______ making weapons to serve the country"s independence. The meeting between him and President Ho Chi Minh in Paris in 1946 changed the life of Pham Quang Le. In 1946, under the requirements of the (20) ______, he was assigned as Head of Military Department by Uncle Ho with the (21) ______ for researching, manufacturing weapons for our soldiers to fight the enemy. Uncle Ho said, “This is the good thing, so from now on your name is Tran Dai Nghia...” A: heroic B: heroine C: heroically D: hero 25 Mark the letter A, B, C, or D on your answer sheet to indicate the word(s) OPPOSITE in meaning to the underlined word(s) in each of the following questions. Question . The famous inventor was not brought up in a well-off family. A: rich B: kind C: wealthy D: poor

Cho tam giác ABC có G là trọng tâm, I, J, K lần lượt là trung điểm GA, GB, GC. Tìm tập hợp điểm M thỏa mãn:/4MA+MB+MC/=2/AB-AC/?(VECTO)

Giúp mình rút gọn với . làm rõ từng bước để mình nghiên cứu nha . thanks

phân tích nhân vật Celes Walt trong bộ lightnovel 'Sevens'

Chứng minh rằng: (ab/a^4+b^4+a.b)+(bc/b^4+c^4+bc)+(ca/c^4+a^4+ca)<=1

mấy bạn giúp mình vẽ hình anh jack đc hok

Các câu dưới đây có gì giống và khác nhau? Câu nào là của tác giả Ngô Tất Tố? Theo em, vì sao tác giả chọn cách diễn đạt này? a) Chồng tôi đau ốm, ông không được phép hành hạ! b) Chồng tôi đau ốm, ông đừng hành hạ! c) Chồng tôi đau ốm, xin ông chớ hành hạ! d) Không được hành hạ chồng tôi Mình đang cần gấp, giúp mình với các cậu yêuuu!!!