结合周卫老师报告简述教师学习特点。
现阶段中国城市中产阶级有哪些特征、基本构成及社会地位、作用？
房地产的市场交易价格是买卖双方（）、（）、（）。 ["收支价款的依据","签订合同的依据","缴纳契税的依据","交付管理费的依据"]
水利水电工程验收工作依据之一的施工图纸和说明是由（）签发。 ["业主技术负责人","设计师","监理工程师","总包技术负责人"]
Your boss at Supportcenter.cn wants you to clarify Oracle 10g. Which statement regarding the usage of redo log files during instance recovery is true？ （） ["Transactions are rolled back using redo log files.","Transactions are rolled forward using redo log files.","Transactions are rolled back using redo log files and archived log files.","Transactions are rolled forward using redo log files and rolled back using redo log files."]
在高压系统中，接地短路电流在（）及以下称小接地短路电流系统。
