B.20V
C.0.5V
D.0V
答案:D
The plane hasn't arrived yet. Could you tell me_________?
A. why the plane is late B. how is the plane late C. when will the plane arrive
目前电网中使用的传感器不包括()。
A.传统传感器
B.超导传感器
C.光纤传感器
D.智能传感器