Tìm số tự nhiên n để 2.2^2+3.2^3+4.2^4+...+ (n-1).2^n-1+n.2^n = 2^n+11

Tính khối lượng của chất có công thức sau CaCo3:Canxi e cacbon nick H2SO:axit sun pu rút H3PO4:axit phút pho ríc Cao:Can xi o xit

giúp vs ai nhanh cho câu hỏi hay nhất

29. Flood is the worst natural that often happens in the central of Viet Nam. (disastrous) 30. We find the English Speaking Contest . (interest) 31. He is one of the most in this campaign. (activity) 32. If Peter keeps acting , we will stay away from him. (polite) 33. I watch the news of Covid-19 on TV every day because it’s very . (inform)

III. Choose the word which best fits each gap. Games and sports are an integral part of a student’s life. A student should study (1)________ to be successful in competitive examinations. But, he should also play games and sports to enjoy the health and vigor of life. We have all heard the old (2)________ “All work and no play makes Jack a dull boy”. The benefits of playing sports are multiple, and it leads to balanced (3)________ and physical growth. It teaches the children life skills like teamwork, leadership, patience. It teaches children discipline and playing (4)________ the rules. Playing and excelling in sports (5)________ teaches kids the importance of hard work, perseverance, learning from failure, and importance of grasping opportunities. All of these experiences and habits are very (6)________ in adult life. 25. a. hard b. hardly c. widely d. easily 26. a. idiom b. speech c. saying d. slogan 27. a. healthy b. mental c. personal d. strong 28. a. within b. for c. of d. without 29. a. ever b. only c. well d. also 30. a. hopeful b. exciting c. useful d. popular

Một năm có bốn quý. Đặt tên và viết tập hợp các tháng(dương lịch ) của quý Hai trong năm. Tập hợp này có bao nhiêu phần tử?

51. they/ to/ movies/ do/ how/ go/ the often? 52. usually/ his/ swimming/ with friends/ he/ goes. Sắp xếp câu hộ em nha

III. Choose the word which best fits each gap. Games and sports are an integral part of a student’s life. A student should study (1)________ to be successful in competitive examinations. But, he should also play games and sports to enjoy the health and vigor of life. We have all heard the old (2)________ “All work and no play makes Jack a dull boy”. The benefits of playing sports are multiple, and it leads to balanced mental and physical growth. It teaches the children life skills like teamwork, leadership, patience. It teaches children discipline and playing (4)________ the rules. Playing and excelling in sports (5)________ teaches kids the importance of hard work, perseverance, learning from failure, and importance of grasping opportunities. All of these experiences and habits are very (6)________ in adult life. 1, a. hard b. hardly c. widely d. easily 2. a. idiom b. speech c. saying d. slogan 3. a. within b. for c. of d. without 4. a. ever b. only c. well d. also 5. a. hopeful b. exciting c. useful d. popular giải thích kĩ không là báo cáo

khi làm văn bản báo cáo có những mục nào? giúp mik v

1. Walking is a good way to keep fit and stay healthily. ……………. A B C D 2. The woman prefers looking after her children than cooking dinner. ……………. A B C D 3. I think you will find that book in the library because there are thousand of ……………. A B C D different books there. 4. He leaved the office and disappeared two days later. ……………. A B C D 5. They looked angry at me when I broke the mobile phone last night. ……………. A B C D