在电能表经常运行的负荷点,Ⅰ类装置允许误差应不超过()
A.±0.25%
B.±0.4%
C.±0.5%
D.±0.75%
参考答案:D
— Do you think the film is good?
— Terrific! ______
A.It couldn’t be better.
B.It could be better.
C.It is still better.
D.It couldn’t be worse.
反投影法的特点不包括
A.速度快B.图像质量好C.变换复杂D.不需进行傅立叶变换E.在实际设备中,主要采用褶积反投影法