不可滥服古柯碱.Don't have cocaine abusively.马钱子碱 、 砷和鸦片都是毒药.Strychnine, arsenic, and opium are poison.酸能使碱中和,碱亦能使酸中和.Acids neutralize alkalis and vice versa....
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...