气体在一定（）和（）下所占的空间体积称为容积
参考答案：温度、压力
单代号网络图以( )表示工作之间的逻辑关系。
A．虚线
B．节点
C．箭线
D．波形线
An analyst does research about industry stages. With respect to life cycle models, an industry characterized by slowing growth, industry overcapacity and increased failures is most likely in the:（）
A. shakeout stage.
B. mature stage.
C. decline stage.
