建设工程( )系统是由多个相互关联的进度计划组成的系统，它是项目进度控制的依据。

A．项目进度计划
B．总进度目标
C．项目进度任务
D．总进度任务

A．( Because they may not judge speeds very well

B．( Because they may step into the road for convenience

C．( Because they cannot run very fast

D．( Because they may become nervous easily