推 tom91xxx:鹽酸不是鹼性的嗎？那為什麼叫「鹽」酸？不是鹹鹹的嗎？
→3.你的回應:______________________________________________________________________________________________________________________ (提示: 鹽酸是酸性還鹼性的? 該用什麼方法測試其酸鹼性，並說明其檢驗結果? 請寫出兩種方法)(5分)推 dnxx:國中課本明明是講硫酸，因為有介紹硫酸能脫水（加糖會變黑）推 JasxxTxx:為什麼會放熱? 誰能說一下嗎? → miisxx4x:因為她加到熱水中... → galileixxx:酸鹼中和反應不放熱是要放什麼？【Michael Chu】評論
(B)Besides 才對…少打一個B
【【站僕】摩檸Morning】評論
原本題目:Nanotechnology is moving closer to our daily life. Researchers from the University of New South Wales, Australia, are developing a coating that may make cleaning bathrooms _____41_____ of a chore. The leading researchers, Professors Rose Amal and Michael Brungs, are hoping to apply a tiny coating of titanium dioxide to keep the toilets clean. Currently titanium dioxide is being used on outdoor items _____42_____ self-cleaning windows.To further keep the bathroom clean, nanoparticles kill the germs and remove organic compounds. _____43_____ , the coating prevents liquid droplets from ...