Cho tam giác ABC cân tai ̣ A có AB = AC = 5 cm; BC = 8 cm. Kẻ AH  BC (H  BC) a) Chứng minh HB = HC b) Tính AH. c) Kẻ HD AB (DAB); HE AC (EAC). Chứng minh DE//BC.

Thu gon, tinh gia tri bieu thuc

AI ĐÓ GIẢI GIÚP TÔI ĐƯỢC KHÔNG? TÔI CẦN GẤP LẮM! AI GIẢI ĐÚNG SẼ ĐƯỢC VOTE 5 SAO. PLEASE HELP ME!

Read the passage carefully, then choose the correct answers. The latest addiction to trap thousands of people is the Internet, which has been blamed for broken relationships, job losses, financial ruin, and even suicide. Psychologists now recognize Internet Addiction Syndrome (IAS) as a new illness that could cause serious problems and ruin many lives. IAS is similar to other problems like gambling, smoking and drinking: addicts have dreams about the Internet; they need to use it as the first thing in the morning; they lie to their parents and partners about how much time they spent online; they wish they could cut down, but are unable to do so. A recent study found that many users spend up to 40 hours a week on the Internet. Some of the addicts are teenagers who are already hooked on computer games and who find it very difficult to resist the games on the Internet. What is the best title of the passage? A: The advantage of the Internet B: A guide to the Internet C: Hooked on the Net D: Impact of Internet on teens

Chọn câu trả lời đúng cho những câu sau: Đặc điểm chung của 4 họa sĩ Nguyễn Phan Chánh, Tô Ngọc Vân, Nguyễn Đỗ Cung, Diệp Minh Châu ? a. Là sinh viên tốt nghiệp trường Cao đẳng Mĩ thuật Đông Dương b. Góp công lớn cho cách mạng và nền nghệ thuật nước nhà c. Được nhà nước tặng giải thưởng Hồ Chí Minh về Văn học-Nghệ thuật năm 1996

Ai đâu trở lại mùa thu trước Nhặt lấy cho tôi những lá vàng? Với của hoa tươi, muôn cánh rã Về đây, đem chắn nẻo xuân sang! +Xác định phong cách ngôn ngữ và phương thức biểu đạt

giải hộ em bài này với hứa vote 5* $\frac{x-90}{10}$ + $\frac{x-76}{12}$ + $\frac{x-58}{14}$ + $\frac{x-36}{16}$ + $\frac{x-15}{17}$ = 15

1 Read the passage carefully, then choose the correct answers. The latest addiction to trap thousands of people is the Internet, which has been blamed for broken relationships, job losses, financial ruin, and even suicide. Psychologists now recognize Internet Addiction Syndrome (IAS) as a new illness that could cause serious problems and ruin many lives. IAS is similar to other problems like gambling, smoking and drinking: addicts have dreams about the Internet; they need to use it as the first thing in the morning; they lie to their parents and partners about how much time they spent online; they wish they could cut down, but are unable to do so. A recent study found that many users spend up to 40 hours a week on the Internet. Some of the addicts are teenagers who are already hooked on computer games and who find it very difficult to resist the games on the Internet. According to the writer, Internet addiction __________. A: can lead to financial problems B: helps people kill time C: is not the same as gambling D: is not an illness 2 Read the passage carefully, then choose the correct answers. The latest addiction to trap thousands of people is the Internet, which has been blamed for broken relationships, job losses, financial ruin, and even suicide. Psychologists now recognize Internet Addiction Syndrome (IAS) as a new illness that could cause serious problems and ruin many lives. IAS is similar to other problems like gambling, smoking and drinking: addicts have dreams about the Internet; they need to use it as the first thing in the morning; they lie to their parents and partners about how much time they spent online; they wish they could cut down, but are unable to do so. A recent study found that many users spend up to 40 hours a week on the Internet. Some of the addicts are teenagers who are already hooked on computer games and who find it very difficult to resist the games on the Internet. Which of the followings is NOT true? A: Internet addiction can cause suicide behaviors. B: Teenagers who are hooked on computer games can suffer from IAS. C: Many Internet addicts spend more than 40 hours a week online. D: IAS is recognized as a new illness. 3 Choose the word whose underlined part is pronounced differently from the others. A: hooked B: satisfied C: bored D: socialized 4 Choose the word whose stressed pattern is pronounced differently from the others. A: event B: teenager C: relax D: adore 5Choose the word whose stressed pattern is pronounced differently from the others. A: community B: addicted C :detest D: leisure

1. Cho đường thẳng (D) có phương trình y = mx + m (m là tham số). a) Tìm m biết (D) đi qua điểm A(1;4) và vẽ (D) với m vừa tìm được. b) Chứng tỏ (D) luôn đi qua một điểm cố định trong hệ tọa độ xOy.

Có 10 hợp tử của một loài nguyên phân một số lần bằng nhau và đã sử dụng môi trường nội boà nguyên liệu tương đương với 2480 NST đơn . Trong các tế bào con được tạo thành, số NST mới hoàn toàn được tạo ra từ nguyên liệu môi trường là 2400. A . Xác định tên loài B. Tính số lần nguyên phân của hợp tử nói trên .