主干线开关失电的故障研判逻辑是什么？
报告式论文正文的组成部分包括（）。 ["前言","方法","结果","讨论"]
为了从物资价格上涨中获利而建立的库存属于（）。 ["经常库存","安全库存","投机库存","季节性库存"]
One engine manufacturer recommends heavy fuel oil should not be heated above 80℃ to 95℃ (176 ℉ TO 203℉) before purificationThis upper limit should be observed to ensure against（） ["flattening of the bowl neoprene O-rings","operation within the explosive rang of the fuel","excessive purifier operating pressures","excessive oil viscosity"]
We have finished（）and are ready for sailing． ["load","loading","will load","to load"]
分支、联络、分段开关失电的故障研判逻辑是什么？
