变压器副边电压与负载电流的变化关系，称为变压器的外特性。
A. 正确
B. 错误
Which two statements are correct about database transportation？（）
A. The source and target platforms must be the same
B. Redo logs，control files and temp files are also transported
C. The transported database must have the same database identifier （DBID） as the source database and cannot be changed
D. The COMPATIBLE parameter must be set to 10.0.0.0 or higher and the database must be opened in readonly mode before being transported
E. Recovery Manager （RMAN） is used to convert the necessary data files of the database if the target platform is different and has different endian format
预算单位按照工作职能和资金管理要求，可以开立以下专用存款账户（）。
A. 基本建设资金账户
B. 党费账户
C. 工会经费账户
D. 住房改革资金账户
GIS软件工程生存周期包含那几个阶段？每个阶段的主要任务是什么？
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