trong hình
Đốt cháy hoàn toàn 5,4 gam nhôm. a) tính thể tích khí oxi cần dùng ở đktc b) Khối lượng Nhôm oxit tạo thành là bao nhiêu?
Trống chùa ai vỗ thì thùng, Của chung ai khéo vẫy vùng nên riêng... Câu hỏi: Câu ca dao này phản ánh điều gì ? Em cho rằng sự phản ánh đó đúng hay sai ? Nhân dân ta hay nói "của chùa" với nội dung gì và có liên quan với câu ca dao trên không ?
cho hệ phương trình {x+y=3 {ax +2y =a Xác định m để hệ phương trình có nghiệm duy nhất , vô nghiệm , vô số nghiệm
Câu 4: Một ngôi nhà dạng hình hộp chữ nhật có chiều dài 12m, chiều rộng 8 m và chiều cao 4m. Người ta muốn quét vôi trần nhà và bốn bức tường phía trong . Biết rằng diện tích các cửa bằng 10,5m2. Hãy tính diện tích cần quét vôi.
Exercise 7: Choose the correct indefinite pronoun in brackets to fill in the blanks. Surprise party Last week was my sister’s birthday. I wanted to give her a present, but I couldn’t think of (1) _____ (anything/ everything) nice to give her. I asked (2) _____ (everyone/ no one) for suggestions but (3) _____ (everyone/ no one) had any ideas. Then my father said, “Why don’t we give your sister (4) _____ (anything/ something) she would really like? A surprise birthday party!” I knew she would love that. I sent out invitations to (5) _____ (someone/ everyone) in her class. My mother prepared (6) _____ (anything/ everything) to eat and drink. My father got some games ready. (7) _____ (Nothing/ Something) was forgotten. At first, my sister was sad on her birthday. She thought (8) _____ (no one/ everyone) had remembered it. At 3 o’clock, the doorbell rang. My sister went to answer the door. (9) _____ (Someone/ Everyone) we invited to the party was there. “Happy birthday!” they all shouted. (10) _____ (Everyone/ No one) was more surprised than my sister! Exercise 8: Choose the correct adverb in brackets to fill in the blanks. Learning to play an instrument Learning to play a musical instrument is difficult. It takes a lot of practice and time. You must choose your instrument (1) _____ (careful/ carefully). Children (2) _____ (often/ well) start with the recorder. It is small and can be carried (3) _____ (easily/ easy). It can be bought (4) _____ (cheap/ cheaply). You start by playing with a group and learning the notes (5) _____ (slowly/ slow). At first, you may (6) _____ (some/ sometimes) play badly but never lose heart. You must practice at least once a day. This way, you will learn (7) _____ (quickly/ quick) and very soon be able to play (8) _____ (good/ well). Parents (9) _____ (ever/ always) like to listen to their children playing. It is lovely to hear an orchestra play (10) _____ (beautiful/ beautifully). Exercise 9: Choose the correct adverb of place in brackets to fill in the blanks. The play Meg had an exciting day at school on Tuesday. When she arrived, she waited (1) _____ (outside/ inside) the main door until her friends came. Then, they went (2) _____ (outside/ inside) and walked (3) _____ (downstairs/ upstairs) to their classroom on the second floor. They went into their room and sat (4) _____ (up/ down) at their desks. “We have some special visitors,” said the teacher. “Let’s all go into the hall.” Everyone went (5) _____ (downstairs/ there) to the hall. “My class, sit (6) _____ (here/ there),” said the teacher pointing to the seats near her. Some actors came (7) _____ (in/ out) onto the stage. They performed a play which included singing and dancing. They asked for a boy and a girl to come (8) _____ (down/ up) onto the stage, and Meg was one of them. All the actors sang and danced, and Meg danced (9) _____ (around/ down) too. She went back (10) _____ (up/ down) to her seat, very happy. Exercise 10: Choose the correct form of the noun in brackets to fill in the blanks. On a plane My Uncle Jacob is a pilot. He works for a big airline company. The (1) _____ (companys/ company’s) planes fly all over the world, so (2) _____ (Uncle Jacobs/ Uncle Jacob’s) work is very interesting. He travels all over the world and meets very exciting people. He works with a large team of people who have different (3) _____ (job’s/ jobs). The (4) _____ (navigator’s/ navigator) job is to find the way. The (5) _____ (co-pilot/ co-pilot’s) job is to help fly the plane. On the flight, there are several (6) _____ (attendants/ attendants’) who help the passengers. They show them to their seats. They put the (7) _____ (passengers/ passengers’) luggage in the (8) _____ (lockers’/ lookers), and serve them food. They give young children games to play, which makes the (9) _____ (children’s/ childrens’) journey more interesting. As for the adults, there is a variety of movies to choose from. The flight (10) _____ (attendant’s/ attendants’) uniforms are very smart. They are proud to do their work.
mn ơi giúp em với :< e chưa hiểu rõ lắm mong mn giúp đỡ e. e cảm ơn ạ
Trong văn bản Đêm nay Bác không ngủ . Thể thơ năm chữ có tác dụng gì Thank
một máy biến áp giảm áp có U1=220V,U2=110 số vòng dây N1=460v vòng N2=230 vòng khi điện áp sơ cấp giảm, U1=160v, để giữ U2=110v không đổi, nếu số vòng dây N2 không đổi, nếu số vòng dây N2 không đổi thì phải điều chỉnh cho N1 bằng bao nhiêu?
Một quả dừa ở trên cây có độ cao cao 5 m rơi xuống mặt đất. Biết rằng, khi ở độ cao 5 m, quả dừa có cơ năng là 100 J. Hỏi, khi rơi xuống độ cao 2 m. Động năng của quả dừa bằng bao nhiêu?
Bài 15-16 nha mọi người giúp em với
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