Before switching on gyro-compass, you should make sure that the power supply on board is
.(1.0)
A.high or low B.AC or DC C.strong or weak D.on or off正确答案B
Before switching on gyro-compass, you should make sure that the power supply on board is
.(1.0)
A.high or low B.AC or DC C.strong or weak D.on or off正确答案B
