当用于(),且技术经济比较合理,可采用单芯电缆。
A、工厂企业配电
B、水下敷设
C、工作电流较大的回路
D、重要建筑物
参考答案:B, C
Despite the rising importance and great convenience of the gyrocompass,the magnetic compass still retain its importance because of its().
A.great convenience
B.finding true north
C.magnetic characteristics
D.simplicity and reliability
燃烧调整的任务是什么?