220kV油浸式电流互感器例行试验的油中溶解气体分析中乙炔的注意值为()。
参考答案:1uL/L
教学上用的吸尘器它的电动机内阻是-定的,当加上0.3V的电压,电流为0.3A时,吸尘器上的直流电动机不转动;当加上2.0V的电压、电流为0.8A时,它正常工作,则吸尘器正常工作时输出功率与输入功率之比为( )
A.3:5
B.5:3
C.1:2
D.1:3
Questions 11 to 15 are based on the following interview.
A. A town built on the concept of new urbanism. B. The set of the movie The Truman Show. C. The Walt Disney Company in Central Florida. D. An American Studies project at New York University.