N - hydroxyethylpyrrolidone ( NHP ) was synthesized from � � - butyrolactone and ethanolamine on Y molecular sieve catalyst by two steps. 以改性Y分子筛为催化剂,γ-丁内酯和乙醇胺为原料,采用γ - 丁内酯法两步合成N - 羟乙基吡咯烷酮 ( NHP ).
We should produce the littoral advantage well.我们应该把海滨的优势很好地发挥出来。The reservoir sandstone was believed to have been deposited in a littoral environment.储集层砂岩就被认为是近海环境的沉积.Climate suitability of seawater crabs culture in Jia...
And on your left, you have Tyrannosaurus Rex, a carnivore from the Jurassic period.在您的左边, 您看到的是暴龙, 一种来自侏罗纪的肉食动物.Tyrannosaurus Rex was a large carnivore; insectivorous plants are considered carnivores.暴龙是一种大型的食肉动物; 食虫植物被看...