cho đường tròn (O, R) đường kính AB. Qua điểm H cố định kẻ dây CD vương góc AB tại H. Điểm M di động trên đoạn HC. Đường thẳng AM cắt (O) tại N. Chứng minh khi M di chuyển trên CH thì trọng tâm G của tam giác ACN di chuyển trên đường tròn cố định

Giúp câu nay vs mn 3ha 17m²= ............ha

Câu 1. Cho 3,36 lít propen đi qua dung dịch brom dư thấy khối lượng dung dịch brom tăng m gam. Tinh giá trị m? Câu 2. Cho 5,6 lit anken A đi qua dung dịch brom dư thầy khối lượng dung dịch brom tăng 7 gam. Xác định CTPT của anken A? Câu 3. Đốt cháy 4,48 lít hỗn hợp anken A và ankan B (ở thể khí ở điều kiện thường) thu được 6,72 lít CO2 và 7,2 gam nước. Xác định công thức phân tử A,B? (khi đo ở đktc) Ai giải giúp e với ạ😥

1) Tom, ____ sits next to me, is from Canada. A. that B. whom C. who D. whose 2) The volunteers, ____ enthusiasm was obvious, finished the work quickly. A. who B. whom C. whose D. that 3) Many scientists have claimed that ____ like music are often good at mathematics. A. children B. children who C. children whom D. whose children 4) My friend, ____ I visited last week, is taking a holiday soon. A. that B. whom C. which D. whose 5) The doctor re examining a patient ____ was taken to hospital last night. A. which B. who C. whom D. whose 6) A pacifist is a person ____ believes that all wars are wrong. A. who B. whose C. whom D. which 7) My friend, ____ hated horror film, refused to go to the cinema with me. A. whom B. which C. whose D. who READING Read the passage carefully and choose the correct answer. Between the Revolutionary period and the World War I, the United States post office was set out to improve transportation of the post office mails. From those early days to the present, the post office has helped develop and subsidize every new mode transportation in the United States. Transportation has been the most important element in mail delivery. Even when the general public had still suspected of the security of a new means of transportation, the post office experimented with inventions that offered potential for moving the mail faster, occasionally suffering embarrassment, ridicule, or even abuse in the process. As mail delivery evolved from foot to horseback, stagecoach, steamboat, railroad, automobile, and airplane, with intermediate and overlapping use of balloons, and helicopters, post office mail contracts ensured the income necessary to build the great highways, rail lines, and airways that eventually spanned the continent. By the turn of the 19th century, the U.S. Post Office had purchased a number of stagecoaches for operation on the nation’s better post roads – a post road being any road on which the mail travels – and continued to encourage new designs to improve passenger comfort and carry mail safely. 8) The passage is about ____. A. transportation of the Post Office in the US B. the Post Office in the Revolutionary period C. the Post Office in the World War I D. transportation and public ideas 9) According to the passage, the main purpose of the Post Office is ____ A. to develop transportation B. to apply new mean of transportation C. to deliver mail as safely and fast as possible D. to subsidize every new mode of transportation 10) Which means of transportation used in the Post Office is NOT referred in the passage? A. train B. car C. plane D. motorcycle 11) The Post Office ____. A. has never used helicopters in delivery D. makes no contribution to build roads B. contributes income to build highways, railroads, and airways C. has never been the first to use a new means of transportation WRITING Choose the underlined part among A, B, C or D that needs correcting. 12) (The) waiter (whom) served us yesterday (was) polite and (friendly). A B C D 13) This class (is) only (for) people (who’s) first language (is not) Chinese. A B C D 14) (The) man with (who) I spoke (in the) meeting used (to work) here. A B C D 15) He (is moving) to Lang Son city, (that) is (in the) north-east (of) Viet Nam. A B C D 35) She (asked) me (if) I knew (whom) had got (the job). A B C D

Tranh về corona nhé mn Nhường cho 0904200848 1 slot nhé Lấy mạng thì lấy đẹp vào

ai guips mk với Mark the letter A, B, C or D on your answer sheet to indicate the word whose underlined part differs from the other three in pronunciation in each of the following questions. A: tense B: stressed C: concentrate D: self-aware

1. Children like to see the _____ in the aquarium 2.people are afraid of ______ when they are at sea 3.after visiting the aquarium , people went to the ______ for lunch 4. I often buy a lot of _______ for my friends at home 5. When my family goes to the beach , we usually eat ________ 6. My favorite seafood is _______

vẽ lại cho mình 1 bức tranh này môn nhạc họa nha các

Các bạn giải nhanh giúp mình các câu mình khoanh tròn với nha. Càng nhanh càng tốt 5h mình phải nộp rồi

Cho tam giác MNP. Kẻ tia phân giác MK của góc M. Từ 1 điểm E thuộc đoạn thẳng KP, ta kẻ đường thẳng song song với MK. Đường thẳng này cắt cạnh MP tại điểm I và cắt tia đối của tia MN tại điểm F. Chứng minh rằng : a, Tam giác MFI cân b, Gọi H là trung điểm của FI. Chứng minh : tam giác MFH = tam giác MIH c, Khi góc NMP = 80°, hãy tính số đo góc trong tam giác MFI