The addition reaction with hydrogen cyanide is base - catalysed.与氰氢酸的加成是碱催化的.Increasing the system pressure increases the concentration of ammonia and hydrogen cyanide.增大体系压力能使氨和氰化氢的浓度升高.The addition of steam inhibits th...
During the Second World War the area was used for gunnery practice.二战期间，该地区被用来操练火炮射击。The traditionally loud voice of the gunnery branch continued to dominate the debate.枪炮专业的声音仍然叫得很响,继续统治着争论.What can you tell me about th...
This paper analyzes the glyceryl polyether by nuclear magnetic resonance ( NMR ) spectroscopy .用 核磁共振 分析了甘油聚醚.The preparation of catalysts , yield of glyceryl triacetate and and demerits the catalysts were introduced bri...