làm hộ mk 1 câu thôi câu n bài 1 nhé

giải giúp mik bài 5 và bài 6 với

giúp mình với ạ!!! ai làm đúng mình vote 5 sao ngay nhé!!! Số sách ở ngăn A bằng 2/3 số sách ở ngăn B. Nếu chuyển 5 quyển sách từ ngăn A sang ngăn B thì số sách ở ngăn A bằng 3/7 số sách ở ngăn B. Tìm số sách ở mỗi ngăn.

Bài 4. biết 800 g rượu có thể tích 1 lít. Tính khối lượng riêng của rượu. Bao nhiêu lít nước sẽ có khối lượng bằng khối lượng rượu trên ? Biết khối lượng riêng của nước là 1000 kg/m3.

1 Mark the letter A, B, C or D to indicate the correct answer to each of the following questions. The picture reminds him of the time______ he studied in New York. A: which B: when C: where D: why 2 Mark the letter A, B, C or D to indicate the correct answer to each of the following questions. If there ______ so many new words, it would be easier to master English. A: aren’t B: are C: were D: weren’t 3 Mark the letter A, B, C, or D to indicate the sentence that is closest in meaning to the original sentence in each of the following questions. My father had gone home before we arrived. A: After my father arrived, we went home. B: After my father had gone home, we had arrived. C: After my father had gone home, we arrive. D: After my father had gone home, we arrived. 4 Mark the letter A, B, C or D to indicate the most suitable response to complete each of the following exchanges. “Let’s have some coffee.” - “______” A: Yes, spot on! B: I’d love to but I may be awake at night. C: Sorry. D: Once in a blue moon. 5 Mark the letter A, B, C, or D to indicate the sentence that is closest in meaning to the original sentence in each of the following questions. The children couldn"t go swimming because the sea was too rough. A: The children couldn’t go swimming because of the rough sea. B: The children couldn’t go swimming because of the sea rough C: The children couldn’t go swim because of the rough sea. D: The children couldn’t go swimming due of the rough sea. 6 Mark the letter A, B, C or D to indicate the underlined part that needs correction in each of the following questions. Picture 5 A: A B: B C: C D: D 7 Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that best combines each pair of sentences in the following questions. I’m so excited. I’m going on vacation with my family tomorrow. A: I’m not excited that I’m going on vacation with my family tomorrow. B: I’m excited that I’m going on vacation with my family tomorrow. C: I’m so excited because I can’t go on vacation with my family tomorrow. D: I’m so excited so I can go on vacation with my family tomorrow. 8 Mark the letter A, B, C or D to indicate the correct answer to each of the following questions. As soon as the spacecraft______into space, the crew started to observe the sun. A: travelled B: had travelled C: was travelling D: has travelled 9 Read the following passageand mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions. When you hear how I learned a foreign language, you have to remember a few things. In 1993, when I started learning English, no one had heard of the Internet. I wasn’t able to read websites on topics that I found interesting or follow blogs. And I have no idea how I decided which movies to see without my favourite movie review website. My reading practice was limited. All I had were a few books on sale locally. For listening practice, I only had the news and cartoons on cable TV. People bought and rented videos but in Poland there was no spoken English on them. The only way to hear that was to visit the movies. My dictionaries were all in book form until I received my first PC dictionary. It came on at least six disks and had unhelpful explanations and few example sentences. It doesn’t sound very useful but I loved it because of its ability to work with other programs and find English words more quickly. Today, computerized dictionaries have simple explanations and lots of examples. Now I can spend hours on the web, reading about my favourite topics, downloading up-to-date movies, emailing English-speaking friends and posting comments on forums. The writer liked his first computer dictionary because it ____________________. A: was better than today’s dictionaries B: gave you useful example sentences C: came with other computer programs D: found information at a faster speed 10 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: study B: subject C: universe D: punctual

Cho x,y là các số thực khác 0 thỏa mãn x + 1/y ; y + 1/x là các số nguyên Chứng minh rằng : x^3y^3 + 1/x^3y^3 là số nguyên

Bài 6. Cho hai khối kim loại chì và sắt. Sắt có khối lượng gấp đôi chì. Biết khối lượng riêng của sắt và chì lần lượt là D1 = 7800 kg/m3, D2 = 11300 kg/m3. Tỉ lệ thể tích giữa sắt và chì

các bạn làm giúp mình tự luận với

helpppppppppp Cuộc khủng hoảng kinh tế thế giới 1929 – 1933 làm cho mâu thuẫn giữa các nước đế quốc càng thêm sâu sắc, những giữa các nước đế quốc, phát xít lại có một điểm chung là A: đều tập trung sức mạnh về kinh tế và quân sự tấn công Liên Xô. B: đều thực hiện đường lối thỏa hiệp, nhượng bộ Liên Xô. C: đều coi Liên Xô là kẻ thù cần phải tiêu diệt. D: đều đặt quan hệ ngoại giao với Liên Xô.

tìm tư đồng nghĩ với từ thong thả