Tính nhanh a.5 x7+7x12+2x7+7 b.10-11-12-13+14-15+16-17+18

viết đoạn văn nghị luận khoảng 200 chữ bàn về sự hèn nhát trong học tập của học sinh

Giải nhùm em nha em cám ơn ạ

vì sao kinh tế nhà nguyễn kém phát triển

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct word or phrase that best fits each of the numbered blanks.(4) THE STAR There are millions of stars in the sky. If you look (1) _______ the sky on a clear night, it is possible to see about 3000 stars. They look small, but they are really (2)_______ big hot balls of burning gas. Some of them are huge, but others are much smaller, like our planet Earth. The biggest stars are very bright, but they only live for a short time. Every day, new stars (3)______ born and old stars die. All the stars are very far away. The light from the nearest star takes more (4) _______ four years to reach Earth. Hundreds of years ago, people (5)_________ stars, like the North Star, to know (6)_________ direction to travel in. Today you can still see that star. A. over B. of C. that D. than 5 Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct word or phrase that best fits blank (5). THE STAR There are millions of stars in the sky. If you look (1) _______ the sky on a clear night, it is possible to see about 3000 stars. They look small, but they are really (2)_______ big hot balls of burning gas. Some of them are huge, but others are much smaller, like our planet Earth. The biggest stars are very bright, but they only live for a short time. Every day, new stars (3)______ born and old stars die. All the stars are very far away. The light from the nearest star takes more (4) _______ four years to reach Earth. Hundreds of years ago, people (5)_________ stars, like the North Star, to know (6)_________ direction to travel in. Today you can still see that star. A. used B. using C. use D. have used Mark the letter A, B, C or D on your answer sheet to indicate the underlined part that needs correction in each of the following questions. You have eat nutritious things to stay healthy. A. nutritious B. have C. healthy D. stay 8 Mark the letter A, B, C or D on your answer sheet to indicate the underlined part that needs correction in each of the following questions. The assistant asked Helen whether those shoes was too small for her. A. whether B. The C. asked D. was 9 Mark the letter A, B, C or D on your answer sheet to indicate the underlined part that needs correction in each of the following questions. If you were on board now, you will experience those marvelous things. A. on board B. will C. experience D. things 10 Mark the letter A, B, C or D on your answer sheet to indicate the underlined part that needs correction in each of the following questions. I disagree because we can’t practise to speak English with native speakers. A. can’t B. because C. with D. to speak

Cách làm bài văn nghị luận chứng minh và giải thích

Chứng tỏ giá trị của A= 1/2 + 1/6 + 1/12 + 1/20 + 1/30 + 1/42 + 1/56 + 1/72 + 1/98 không bằng một số nguyên.

Nêu cấu tạo của hệ thần kinh dưới hình thức sơ đồ

cho tam giác ABC vuông tại A, AB=18cm, AC= 24cm. Đường cao AH a/ chứng minh ∆HBA đồng dạng ∆ABC b/ Tia phân giác của: góc ABC cắt AH, BC lần lượt tại I và D. Tính độ dài AD,DC c/ chứng minh BD.HI= BI.AD d/ kẻ DM vuông góc BC(M thuộc BC). Tính diện tích của ∆MDC

Một tên lửa có khối lượng tổng cộng 100 tấn đang bay với vận tốc 200m/s đối với trái đất thì phụt tức thời ra phía sau 20 tấn khí với vận tốc 500m/s đối với tên lửa . Tính vận tốc của tên lửa sau khi phụt khí .