Tìm một số có hai chữ số biết rằng tổng của hai chữ số bằng 8 và nếu ta viết hai chữ số ấy ngược lại thì một số lơn hơn số 18

Trong các từ sau, từ nào là từ ghép ? a)ngoan ngoãn b)mập mạp c) rực rỡ d) bờ bãi

(7/12+15/72):19/15= .......giúp tui

Giúp mình câu 1b với ạ Mình cảm ơn

Tìm 4 phân số bằng phân số âm mười phần mười lăm

Mọi ng ơi giúp mình ik quá hạn nộp bài r

cho hỗn hợp kim loại gồm Mg, Cu, Al, Ag. Em hãy nêu phương pháp loại bỏ kim loại Al trg hỗn hợp nhưng vẫn giữ nguyên các kim loại còn lại

II. Read the passage and answer the questions. In 1761, an artificial waterway opened. It joined a coal-mining area with theportofManchester. This wasEngland’s first man-made waterway, or ‘canal’. Soon the price of coal in this part of the country went down, and the owner of theBridgewatercanal became rich. In the late 18th century landowners and businessmen built many new canals to make money. There was no canal plan for the country, but the canals completely changed the transport of heavy goods in England. Prices of factory goods went down because transport cost less than before. One horse could now pull 50 tons on a canal boat. Before, it could pull less than one ton on a road cart. The canal network was a very important part of the Industrial Revolution in Britain, but canals had only a short life. In the mid 19th century, the new railways became the most modern form of transport. The men who built the canals were called ‘navvies’. They moved around country in groups from canal to canal. Ordinary people did not like the navvies, because they wore strange clothes, had no real homes, and because they often drank too much beer. The Nottingham andBeestonCanalhad two parts. It opened in 1796 and was an important six-mile link in the Trent Navigation - a system of canals and rivers which joined the Midlands with the River Humber and theportofHull. This carried goods from inland factories to the sea. Now it is no longer a working canal. It is a place for people who like walking or fishing. 1. Why did the price of coal roundManchesterdecrease? ___________________________________________________________________________ 2. Why didn’t people like the canal builders? ___________________________________________________________________________ 3. What did the boats on this canal carry? ___________________________________________________________________________ 4. Why was the waterway fromMidlandtoHullimportant? ___________________________________________________________________________ 5. Why did the network of canals become less important in a short time? ___________________________________________________________________________

a, Mưa...to,gió...thổi mạnh b, Trời...hứng sáng,nông dân...ra đồng c, Thủy tinh dâng nước cao....Sơn Tinh làm núi cao lên ......

Thả một vật nặng 1kg rơi từ độ cao 200cm xuống đất. Khi đó trọng lực đã thực hiện một công bằng bao nhiêu? A.20N B.20J C.20kW D.20W