Pseudomembranous colitis is caused by Clostridium difficile, and has become more common with increasing antibiotic use.伪膜性大肠炎是困难状杆菌所引发的, 随著抗生素使用增加,这个疾病也变的更加容易出现.Ulcertitive colitis is associated with an incidence of mult...
The isocyanates can be obtained by the fluorination of nitrogenous cylic or acyclic molecules.异氰酸酯可由含氯的环(或非环)状分子氟化而得.The inheritance hierarchy is actually a directed acyclic graph.注意:继承实际上是开放的层次关系.The Acyclic Dependencie...