【单选题】用万用表正确测量二极管的正反向电阻均为∞,则该二极管( )
【单选题】向变电站监控系统设备供电的交流电源应有中性线(零线)回路,中性线应与接地网相连。()
【判断题】回溯法可以使用剪枝函数减少对无效解的搜索。
【判断题】增加科目时,科目代码可以重复使用。 ( )
【单选题】How do you determine the weight of the vessel that is supported by the ground when a vessel has run aground? ______.
A.
This requires extensive calculation and is usually performed only by a naval architect not by a ship's officer
B.
Determine the point where aground and the draft at that point,then calculate it using the grounding formula
C.
Use the hydrostatic tables and enter with the mean draft before grounding and the mean draft after grounding
D.
Use the inclining experiment formula and substitute the change of trim for the angle of list