慢性肺心病患者长时间CO2潴留，若吸入纯O2可致呼吸暂停。原因是这种病人呼吸中枢兴奋性的维持主要

● The actual configuration of a PERT/CPM network _____ the amount of resources that can be devoted to the project.

A Increases.

B Is not affected by

C Does not require

D Is heavily dependent upon

E Is the only means of determining

101 The actual configuration of a PERT/CPM network _____ the amount of resources that can be devoted to the project.

A. Increases.

B. Is not affected by

C. Does not require

D. Is heavily dependent upon

E. Is the only means of determining

183 The actual configuration of a PERT/CPM network _____ the amount of resources that can be devoted to the project.

A. Increases.

B. Is not affected by

C. Does not require

D. Is heavily dependent upon

E. Is the only means of determining

The first step in building a PERT/CPM network is to:

A.Create a flow chart

B.Determine the critical path

C.Show task relationships

D.Create a work breakdown structure

E.None of the above.

● The first step in building a PERT/CPM network is to:

A Create a flow chart

B Determine the critical path

C Show task relationships

D Create a work breakdown structure

E None of the above.

190 The first step in building a PERT/CPM network is to:

A. Create a flow chart

B. Determine the critical path

C. Show task relationships

D. Create a work breakdown structure

E. None of the above

72 The first step in building a PERT/CPM network is to:

A. Create a flow chart

B. Determine the critical path

C. Show task relationships

D. Create a work breakdown structure

E. None of the above

47 The major difference between PERT and CPM networks is:

A. PERT requires three time estimates whereas CPM requires one time estimate.

B. PERT is used for construction projects whereas CPM is used for R & D.

C. PERT addresses only time whereas CPM also includes cost and resource availability.

D. PERT requires computer solutions whereas CPM is a manual technique.

E. PERT is measured in days whereas CPM uses weeks or months

A．CPM的工作逻辑关系肯定，PERT的工作逻辑关系不确定

B．CPM使用最大可能工作时间估计，PERT使用加权平均时间估计

C．CPM的工作必须进行，PERT的某些工作可以不进行

D．CPM不允许存在回路，PERT中可以存在回路