The corresponding reaction of acetaldehyde is subject to general base catalysis.乙醛相应的反应服从广义的碱催化.During alcoholic fermentation acetaldehyde acts as a hydrogen acceptor instead of oxygen.在这个过程中乙醛取代了氧作为氢的受体.Alcohol dehydrog...
We don't train them only in bricklaying, but also in other building techniques.我们不仅仅训练他们砌砖，而且教给他们其他建造技术。Now, I'm going to show you something about bricklaying.我现在要告诉你一些有关砌砖的事.That's a skillful piece of bri...
Are cavernous sinus hemangiomas and cavernous malformations different entities?海绵窦血管瘤和海绵状血管畸形是不同的病变 吗 ?Hemangiomas are the most common benign vascular tumors of andand neck region.血管瘤是婴幼儿最常见的先天性良性血管肿瘤,约60%发生于头颈部.Objectiv...
我热情地微笑着,所以他不会看出我的紧张.I smiled warmly so he wouldn't see my nervousness.为了激发年轻人对音乐的兴趣，她一直孜孜不倦、积极热情地工作。She worked indefatigably and enthusiastically to interest the young in music.他热情地称赞了两位领导人的政治家风范。He praised the two ...