立克次体的特点有（） A.需寄生于活细胞内 B.有类似于细菌的细胞壁结构 C.繁殖方

感邪后缓慢发病，这种发病形式是（）

A.复发

B.继发

C.合病

D.并病

E.徐发

对病毒性肝炎下列哪项是正确的

A．慢性迁延型肝炎多发展为肝硬化

B．甲型肝炎无慢性带毒状态

C．慢性活动性肝炎均由乙型肝炎病毒引起

D．丙型肝炎不会发展成肝硬化

E．肝细胞癌与慢性乙型肝炎病毒感染无关

在关系运算中，要从关系模式中指定若干属性组成新的关系，该关系运算称为______

Initiating process group consists of the processes that facilitate the formal authorization to satart a new project or a project phase. Initiating processes are often done external to the project’s scope of control by the organization or by a program or portfolio processes which may blur the project boundaries for project inputs. Before beginning the initiation process group, ______.

A．a scope management plan is created to document how the project scope will be defined, verified and controlled

B．a project management plan is developed

C．specific activities that need to be performed to produce the various project deliverables are determined

D．none of the above

黄遵宪（1848年～1905年）在《今别离》一诗中写道：“别肠转如轮，一刻既万周；眼见双轮驰，益增心中忧。……车舟载离别，行止犹自由。今日舟与车，并力生离愁；……送者未及返，群在天尽头。”诗中反映的近代社会景象是  

A．社会剧变导致人口的大量迁徒

B．近代交通工具改变人们的生活

C．追求自由观念日益深入人心

D．近代以来出国留学热潮的兴起