Prior to starting, the purpose of turning over a main propulsion diesel engine with the cylinder test cocks open, is to （） ["test the starting system","remove condensation from the cylinders","check the compression","check for proper lube oil pressure"]
在WORD 2003中，文档对齐方式包括（）。 ["左对齐","分散对齐","右对齐","两端对齐","居中"]
有毒气体可分为刺激性气体和（）两种。 ["有害气体","污染气体","窒息性气体","放射性气体"]
配电自动化与调度自动化有哪些区别？
WORD 2003的文档打印方式包括（）打印。 ["选定内容","当前页","页码范围","全部","以上四个都不对"]
在分条整经机上为什么主要放分绞筘和定幅筘？而在分批整经机上只安装一个伸缩筘就可以了。
