A. 正确 B. 错误
A. 额定电压比 B. 额定容量 C. 最大容量
A. 2 B. 4 C. 6 D. 8
A. vessel's geographic position B. vessel's heading C. earth's magnetic field D. influence of the magnetic materials of the vessel
A. 1949 B. 1946 C. 1945