This means if we do nothing in terms of preserving and using water wisely, it is only a matter of time before all regions begin to experience water crises and all the repercussions that come with it.
查看答案
Never assume that your society is too advanced to experience water shortage.
利用变介质型电容传感器可以用来测量下列哪些物理量( )
A. 厚度
B. 位移
C. 湿度
D. 液位
电容传感器从原理上可以分为( )
A. 变面积式
B. 变极距式
C. 变介质式
D. 极筒式
如何提高变极距型电容传感器灵敏度( )
A. 应减小极间间隙d,但受电容器击穿电压的限制
B. 加云母层后,可以大大减小极距
C. 增大极间间距d
D. 采用差动结构
E. 增加原始电容值C0