先进表面处理工艺的摩擦学特性研究
对于跨度8m的钢筋混凝土简支梁，当设计无要求时，其梁底木模板跨中可采用的起拱高度有（）。 ["7mm","10mm","15mm","22mm","25mm"]
根据CRM系统的一般模型，可以将CRM软件系统划分为（）。 ["接触活动","业务功能","数据仓库","数据挖掘"]
You experienced a loss of data files in your database. You did not lose any of your control files. You are going to use RMAN to restore and recover the database. Currently， your instance is shut down. Which sequence of commands is correct to restore and recover your database？（） ["A","B","C","D"]
程序性知识的学习一般过程是（）。 ["有关规则的意义学习（陈述性知识的学习）","通过应用规则的变式练习，使规则的陈述性形式向程序性形式转化","规则完全支配人的行为，技能达到相对自动化的程度","应用有关规则，支配和调节自己的认知行为，达到提高学习与记忆效率的目的"]
建立渗流模型应遵循哪些原则？
