Đâu là nguyên nhân quan trọng nhất làm nên những thắng lợi của quân và dân ta trong giai đoạn đầu của cuộc kháng chiến (1946-1950)?

1 ) Tìm a và b biết rằng PT ax mũ 2 -2bx +3 =0 có tập nghiệm S = (-2 ;1 )

A tìm 2 số chẵn liên tiếp có tổng bằng 4010 B tìm 2 số lẻ liên tiếp có tổng bằng 952 Làm nhanh giúp em với ạ

Giải hệ phương trình: $\left\{\begin{array}{l}x^3+y^3-4x^2+3y^2+8x+4y-16=0\\\sqrt{x-1}-\sqrt{y+3}=-1\end{array}\right.$

Hòa tan hoàn toàn hỗn hợp gồm Zn và ZnO người ta phải dùng vừa hết 600ml dung dịch HCl 1M và thu được 0,2 mol khí H2 và dung dịch X. Tính nồng độ mol các chất có trong dung dịch X

Chị nguyenthanhvan1 ơi???????? GIẢI GIÚP EM ĐI!!!!!!!!!!!!!!! Đổi sang quá khứ và đặt câu: 1. think--> 2. send--> 3. learn--> Đặt câu có sử dụng 3 từ đó

(x + 1)*(x2 – x + 1) – 2x = x*(x + 1)*(x – 1)

Thắng lợi mở đầu của quân và dân ta chống chiến lược "Chiến tranh cục bộ" là

I. Read the following paragraph and complete it which one suitable word in each blank. I was very excited to know that I was going to Australia for a study tour (1) ……… four months. I didn’t think (2) …………… the problems of speaking English until I met my host family. At first, I couldn’t communicate (3) ………… them because my English was so bad. All the eight years I had been learning English wasn’t much used at all because we didn’t have real practice at school. Even (4) …………. my grammar was good, my pronunciation wasn’t. My problem is pronouncing “I’ and “n”. For (5) …………, I wanted to tell them that “I have lots of homework today,” but I said “I have nots of homework today,” so they misunderstood me. My host mum (6) ……….. me a lot by correcting my bad pronunciation. I usually practiced by talking to (7) …………… when I had a shower, so no one could hear me. After four months, my English was (8) ………….. Apart from English, I learnt to make my (9) ……….. breakfast and lunch. I had to ride a bicycle to school every day. I went swimming and tried sailing. Sometimes I also tried skiing. It was wonderful. But (10) ……….. most valuable thing was that I learnt to be by myself and to be independent. II. Read the text and answer the questions below In Canada and the United States, one of the most popular days in the year is Halloween. Halloween is on October 31st. It’s a day when some people dress up in strange or unusual costumes. For example, they may dress up to look like an animal, a person from a book or movie or a famous person from history. In some places, children go to school in their Halloween costumes. After dark, many young children put on their costumes and visit their neighbours. They knock on the door and shout “Trick or treat!”, then the neighbours give them some candy or chocolate, and the children go on to the next house. Adults also enjoy dressing up for Halloween. There are usually Halloween parties in the evening and usually there is a prize for the best or most unusual costume. 1. What is one of the most popular days in the year in Canada and the United States? ___________________________________________________________________ 2. Who do some people dress up to look like on Halloween? ___________________________________________________________________ 3. What do some children in some places in Canada and the United States wear when they go to school on Halloween? ___________________________________________________________________ 4. What do many young children do in the Halloween’s evening? ___________________________________________________________________ 5. What are usually there in the Halloween’s evening? __________________________________________________________________ (ai giúp mình với)_

Hãy viết một đoạn văn ngắn theo phương pháp diễn dịch hoặc quy nạp (khoảng 10 dòng) trình bày luận điểm: Sách là một món ăn tinh thần không thể thiếu được đối với con người.