【判断题】推力调心滚子轴承主要承受径向荷载,其承载能力比推力轴承大得多。
【单选题】What does IA stand for?
【判断题】Cargo insurance is one of the most important parts in international trade. Insurance policy is an evidence of government policy referring to insurance market.( )
【单选题】分布式数据库两阶段提交协议是指(57)。
【简答题】There are four persons to be qualified to sign insurance document namely (1) ______ (2) his agent, (3) ______ (4) his agent.
【单选题】( ) 轴承主要承受径向载荷,其公称接触角 α 越大,承受轴向载荷的能力也越 大