有机化学背景，个人感觉事故的最重要的原因是对底层原理的不理解，加上态度上的不严谨，和管理者出于提高效率或者懒惰的默许。 很多人就会借鉴前人（比如师兄师姐）的常规操作，如果你从底层理解了就会自然而言采取预防措施。但是不得不说，你要什么都做到位，真的是非常费时间的，但是最好还是要做到位，否则会对自己，对别人，甚至整个实验室，学校，非常不负责。 四氢呋喃回流起火 ...

The men and women who work in the shelter try to accord some dignity to the thousands of people in limbo there. Central Airport THF is a moving portrait of displaced people in transition, and its ...

The head of one of Toowoomba’s most successful charities has announced her resignation after nearly a decade in the job.