Người ta quét Sơn mặt ngoài của một thùng dạng hình hộp chữ Nhật không có nắp có chiều dài 1,8m ,chiều rộng1,5m, chiều cao 1,4 m .tính diện tích đã quét son

Hứa vote 5* Mk cần mn giúp sớm

2 người cùng làm 1 công việc trong 7h12 thì xong công việc. Nếu người thứ nhất làm trong 4h người thứ hai làm trong 3h thì được 50% công việc. Hỏi mỗi người làm 1 mình trong mấy giờ thì xong công việc?

I. Read and complete. (Đọc và hoàn thành.) bike/ why/ because/ don’t/ ride 1. ____(1)____ climb the tree! A: Why shouldn’t I ____(2)____ too fast? B: Because you may fall off your____(3)____ . 3. A: ____(4)____ shouldn’t I run down the stairs? B: ____(5)____ you may fall and break your leg.

Câu 1: Tính khối lƣợng Cu thu được khi khử 32 gam CuO bằng khí hidro A. 64 gam B. 76,8 gam C. 25,6 gam D. 19,2 gam Câu 2: Tính khối lượng nước thu được khi cho 13,44 lít khí hidro tác dụng với 8,96 lít khí oxi A. 10,8 gam B. 28,8 gam C. 14,4 gam D. 21,6 gam

You must close the door before going out Đúng hay sai

Mong đươc bạn giỏi văn giúp ạ Hứa vote 5*

Câu 1: Số phân tử hidro có trong 0,3 gam khí hidro là: A. 6. 1022 phân tử B. 0,9.1023 phân tử C. 3.1022 phân tử D. 0,9.1022 phân tử Câu 2: Tính thể tích khí hidro để điều chế 12,8 gam Cu từ CuO A. 2,24 lít B. 4,48 lít C. 3,36 lít D. 1,12 lít

Một cần trục nâng một thùng hàng có khối lượng 850kg lên độ cao 5,5m trong thời gian 18s. Tính công suất của cần trục.

1. 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: luxury B: cultural C: pollution D: drumhead 2. Stretching the drumhead is the most challenging stage (27) _______ they have to carefully assess the sound it makes. A: although B: so C: since D: but 3. Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions. When Mr. Sam was very young, he mostly helped his parents by ________. A: applying the woodblocks with proper paints and pressing them on sheets of paper B: drawing with a pen and using proper paints to make many copies of paintings C: applying seashell powder to make various paints for painting making D: collecting and taking the paintings to the market for sale 4. Mark letter A, B, C or D on your answer sheet to indicate the sentence that is closest in meaning to the original sentence in each of the following questions. The artisan moulded the copper to make a bronze drum. A: The artisan moulded the copper because they want make a bronze drum. B: The artisan moulded the copper so that they could make a bronze drum. C: The artisan moulded the copper so that they can make a bronze drum. D: The artisan moulded the copper because of they wanted make a bronze drum. 5. Mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the following questions: Do you know who’s _____________ his pottery workshop? A: passing down B: bringing out C: taking over D: turning down 6. Mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the following questions: All the main parts of this machine are ___________ of steel. A: made B: given C: done D: woven 7. Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions. The themes of Dong Ho paintings are about ________. A: various aspects of life B: animals and flowers C: landscapes D: weddings 8. Mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the following questions: _____________ she’s young, she’s the most famous artisan in the village. A: Whereas B: When C: Although D: In order to 9. Nowadays, Doi Tam drums are not only famous in Viet Nam but are also (28) _______ to other countries such as Laos, Cambodia, Japan, and the USA. A: be sold B: selling C: sold D: sell 10. Mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the following questions: They keep changing the decoration of the shop ________ they can attract more young people. A: so that B: when C: although D: because 11. Mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the following questions: The people in my village cannot earn money for their daily life. They can’t _____________ this traditional craft. They have to find other jobs. A: live on B: work on C: set up D: help out