The purpose of the flywheel is to （） ["provide energy to operate the engine between power impulses","neutralize the primary inertia force of the crankshaft","reduce the shock of starting loads on the main bearings","prevent the engine from operating at critical speed"]
目前列车集中供电广泛采用的1FC5、1FC6系列同步发电机的励磁装置为谐振式（）恒压装置。 ["直流励磁机","相复励","串励","他励"]
具有脱分化潜力的细胞是（） ["人上皮细胞","人红细胞","植物薄壁细胞","植物筛管细胞"]
文书材料归业务指导是（）中的重要组织部分，归档业务指导能提高全员归档意识。因此，文书档案人员的归档业务指导所产生的效果直接关系到归档文书材料的质量。 ["A.人事档案管理工作","B.科研档案管理工作","C.文书档案管理工作","D.会计档案管理工作"]
While overhauling a jerk-type fuel pump it is necessary to replace the pump plungerWhich of the parts listed below must also be replaced?（） ["Delivery check valve","Pump barrel","Tubing to the injector","Cam follower"]
生料浆的主要成份是什么？
