试说明引起进程撤消的主要事件.
参考答案：
A.正常结束；
B.异常结束；
C.外界干预；
The politician has been warned that he would be getting into great trouble _______ stick to his standpoint.
A．were he to
B．he will
C．he was to
D．would he
我国医疗机构众多，各医疗机构性质、级别、管理方式存在差异。所以医疗机构应当建立本机构抗菌药物管理工作制度（）
