单项选择题

()是指限制项目管理班子做出决策的各种因素，包括项目内部制约因素和项目外部制约因素。

A.工程项目概况
B.项目约束条件
C.历史资料
D.各种假设

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On which of the following would the author most probably agree?
A．We might as well google our symptoms instead of turning to shrinks.
B．Arnall's theory has been discounted in that it does not quite fit the fact.
C．There lies a relation between the demographics of visitors and their incomes.
D．Depression during November primarily affects the young and the old.

A.We
B.
B．Arnall's
C.
C．There
D.
D．Depression
E.

单项选择题

动态误差的误差参数是()的函数关系。

A.静态误差
B.空间
C.时间
D.时空