Viết chương trình Pascal sử dụng mảng để nhập từ bàn phím các phần tử của một dãy số độ dài của dãy cũng được nhập từ bàn phím sau đó tính tổng các số lẻ rồi hiển thị ra màn hình

tìm x 1/3 +2/7 < 0.5 - 2/3x < 3/4 + 0,25

15. After George had returned to his house, he was reading a book. A B C D giải thích nha

Computers are helpful in many ways. First, they are fast.They can work with information even (25)_______quickly than a person. Second, computers can work with a lot of information at the same time.Third, they can (26)_______information for a long time. They do not forget things that the common people do. Also, computers are almost always correct. They are not perfect, (27)_______ they usually do not make mistakes. Recently, it is important (28)_________ about computers. There are a number of things to learn.Some companies have classes at work. In addition, most diversities offer day and night courses in Computer Science. Another way to learn is from a book, or from a friend. After a few hours of practice, you can work with computer, you may not be an expert but you can have fun. Question 25. A. more B. most C. the more D. the most Question 26. A. get B. keep C. last D. have Question 27. A. and B. so C. or D. but Question 28. A. of know B. to know C. knowing D. know

Each classroom in my school has one projector and one computer. → There is 2. We have a plan to visit him on Tuesday next week. → We are 3. Mary usually gets 8 for her Maths tests. Dave usually gets 10 for his Maths tests. → Dave is 4. No pyramid in the world is greater than the Great Pyramid of Giza. → The Great Pyramid of Giza 5. It would be a good idea if we learn in groups to help each other. → Students should

mik cần gấp lắm ạ,giúp mik với ạ,mik xin cảm ơn

Giải chính xác, đầy đủ giúp mình nhé

Giải hộ mình với ạ, mình đang cần gấp!

Cho tam giác ABC có 3 góc nhọn, kẻ hai đường cao BD và CE cắt nhau tại H. 1. Chứng minh bốn điểm A, E, H, D cùng thuộc một đường tròn . xác định tâm I của đường tròn đó. 2. Chứng minh AH vuông góc BC. 3. Cho góc A = 600 , AB = 6cm. tính BD. 4. Gọi O là trung điểm của BC. Chứng minh OD là tiếp tuyến của đường tròn (I) CÂu 4 ạ

1.They built the school in 1990. * a. The school was being built in 1990. b. The school was built in 1990. c. The school was building in 1990. d. The school which was built in 1990. 2.He used to travel around the country * a. He liked travelling around the country. b. He no longer travels around the country. c. He is used to travelling around the country. d. He never travelled around the country. 3.The last time I went to the museum was a year ago. A. I have not been to the museum for a year. B. A year ago, I often went to the museum. C. My going to the museum lasted a year. D. At last I went to the museum after a year 4The police started investigating the case a week ago. A. The police have investigated the case for a week. B. The police has investigated the case for a week. C. The police have investigated the case since a week. D The police has investigated the case for a week. 5.I would prefer you not to smoke in here. * A. I'd rather you didn't smoke in here. B. I'd rather you shouldn't smoke in here. C. I'd rather you not to smoke in here. D. I'd rather you don't smoke in here. Thì hiện tại hoàn thành , thì quá khứ đơn