肺的组织权重因子为（）A.0.01 B.0.04 C.0.08 D.0.12 E.0

John told me that he had lost his key to the car, but he didn't really lose it-that's just a(an)________．[ ]

A．fool  

B．event

C．performance  

D．trick

The bank is reported in the local newspaper _____ in broad daylight yesterday.     [ ]

A. being robbed              

B. having been robbed    

C. to have been robbed        

D. robbed

现代计算机网络管理系统组成要素中，（）是最重要的组成部分。

A.被管代理

B.网络管理协议

C.管理信息库

D.网络管理器

一般我们在利用信息资料进行调研时，这些资料被分成两种，即（）。

A、企业内部资料和外部资料

B、组织资料和员工资料

C、原始资料和次级资料

D、历史资料和现状资料

The center of buoyancy is located at the（）.

A.geometric center of the waterplane area

B.intersection of the vertical centerline and line of action of the buoyant force

C.center of gravity of the vessel corrected for free surface effects

D.geometric center of the displaced volume