Planning and scheduling are ______.

A) separate and distinct tasks and have little relationship to each other
B) the only means for assuring project resources
C) distinct but inseparable aspects of the successful project
D) tasks which take place in parallel in a project environment

急性单纯性阑尾炎

A．阑尾轻度肿胀，浆膜充血并失去正常光泽，表面有少量纤维素性渗出物
B．阑尾各层均有水肿和中性粒细胞浸润、黏膜表面有小溃疡和出血点
C．阑尾肿胀明显，浆膜高度充血，有脓性渗出物附着
D．阑尾管壁坏死或部分坏死；呈暗紫色或黑色
E．大网膜移至右下腹部，将阑尾包裹并形成粘连，出现炎性肿块