Which of the following devices is common to both mechanical and hydraulic governors?（） ["Direct linkage between the ball-head and fuel rack","A servomotor","A compensating device","Flyweight"]
煤气流量的设定值不变时，加减旋塞全部关小1/8，流量自动调节翻板会（） ["开大","关小","不变"]
（）是描述热力学系统内部物质分布状况的状态参数。 ["比容","温度","容积","压力"]
当系统发生变化时，状态参数的数值变化完全取决于（），而与（）无关。 ["状态变化的具体途径，起始状态和最终状态","起始状态的具体途径，最终状态","最终状态化的具体途径，起始状态","起始状态和最终状态，状态变化的具体途径"]
煤气交换时当空废气交换后需短暂停顿，再开煤气，那是因为（） ["让燃烧室内有足够的空气","让残余煤气烧尽","让废气排尽","让系统空气排尽"]
“人”为什么也成为了资源？
