当交叉路口的绿色信号灯亮时，甲车以a=2m/s2的加速度由静止起动，与此同时，乙

模块独立性的两个度量指标是内聚性和______。

美国霸权主义政策严重受挫是在[ ]

A．侵略朝鲜战争失败后

B．海湾战争后

C．侵略越南战争失败后

D．柏林危机后

According to Piaget, there are two principal types of cognitive structures which he called______.

A．schemas and concepts

B．conscious mind and unconscious mind

C．stimulus and response

D．response and consequence

Many useful tools and techniques are used in developing schedule. ______ is a schedule network analysis technique that modifies the project schedule to account for limited resource.

A．PERT

B．Resource levelling

C．Schedule compression

D．Critical chain method

下列结构中，既属呼吸系统，又属消化系统的是[ ]

A．鼻　

B．喉　

C．咽　

D．气管、支气管