Giải giúp mình với ạ Câu 2.Trộn 200ml dd H2SO4 0,05M với 200ml dd Ba(OH)2 a M thu được dung dịch có ph=13 và m gam kết tủa của B . tính a và m

Câu 3 : Vì sao xuất hiện thành thị trung đại ? Nền kinh tế thành thị khác gì so với kinh tế lãnh địa?

Rút gọn: căn(x-2 căn (x-1)) với x >=0

Vì sao các tác gia là quan lại nhà lê mà lại viết về nguyễn huệ một cách hào hùng và lẫm liệt như vậy

Đề: Ngày nay, các em làm những gì để thể hiện lòng yêu nước, niềm tự hào dân tộc và ý chí quyết tâm bảo vệ chủ quyền dân tộc trong thời đại của mình? Viết từng ý, càng dài càng tốt

Giải giúp mình 5 câu cuối với ạ

CẦN GẤP LẮM MỌI NGƯỜI, GIÚP MÌNH !!!!!?? Các đới khí hậu ở châu Á NẰM Ở KHOẢNG VĨ ĐỘ BAO NHIÊU? Lưu ý : Nằm ở vĩ độ nào????! Yêu cầu : chính xác, rõ ràng, ngắn gọn, đúng ý chính

hãy vẽ 3 hình chiếu của vật thể dưới đây:

33. Choose the best answer that is rewritten to emphasize the underlined part. I really admire my teacher for her memory. A. It is my teacher who I really admire for her memory. B. It was my teacher who I really admire for her memory. C. It was my teacher that I really admire for her memory. D. It is my teacher whom I really admire for her memory. 34. Choose the best answer that is rewritten to emphasize the underlined part. My son found internet useful to his English learning. A. It was internet that my son found useful to his English learning. B. It is internet that my son found useful to his English learning. C. It was internet which my son found useful to his English learning. D. It is internet my son found useful to his English learning. 35. Choose the best answer that is rewritten to emphasize the underlined part. His best friends gave David much help. A. It is David who was given much help. B. It was David who was given much help. C. It was David that gave much help. D. It is David who gave much help. 36. Choose the best answer that has the same meaning as the given one. Doing physical activities is necessary for children. A. Children shouldn’t do physical activities. B. Children need to do physical activities. C. Children mustn’t do physical activities. D. Children had to do physical activities. 37. Choose the best answer that has the same meaning as the given one. It is good for parents to communicate with their children to improve family relationship. A. Parents don’t have to communicate with their children to improve family relationship. B. Parents shouldn’t communicate with their children to improve family relationship. C. Parents needed to communicate with their children to improve family relationship. D. Parents ought to communicate with their children to improve family relationship. 38. Choose the best answer that has the same meaning as the given one. It’s a good idea for parents to teach their children to do housework. A. Parents don’t have to teach their children to do housework. B. Parents shouldn’t teach their children to do housework. C. Parents had to teach their children to do housework. D. Parents should teach their children to do housework. 39. Choose the best answer that has the same meaning as the given one. Silence your cell phone, please. A. Cell phones mustn’t set up to be silent. B. Cell phones must set up to be silent. C. Cell phones mustn’t be set up to be silent. D. Cell phones must be set up to be silent. 40. Choose the best answer that has the same meaning as the given one. Cameras or video equipment is prohibited. A. Cameras or video equipment mustn’t be used in this area. B. Cameras or video equipment mustn’t use in this area. C. Cameras or video equipment must be used in this area. D. You can use cameras or video equipment in this area.

các bạn làm giúp mình với ạ, có chình bày với nhé ( cô bắt mình trình bày lun) cam rơn ạ!!!!