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新闻工作的“二为方向”是指坚持改革方向和开放方向。
A. 正确
B. 错误
You perform differential incremental level 1 backups of your database on each working day and level 0 backupon Sundays， to tape. Which two statements are true about differential incremental backups（）
A. The backup performed on Sundays contains all the blocks that have ever been used in the database.
B. The backup performed on Sundays contains all the blocks that have changed since the last level 1 backup.
C. The backup performed on each working day contains all the blocks that have changed since the last level 0 backup.
D. The backup performed on Monday contains all the blocks that have changed since the level 0 backup， and every other working day contains all the blocks that have changed since the level 1 backu
商业银行客户经理主要通过下列哪种方式去约见客户（）。
A. 电话约访
B. 陌生拜访
C. 信函开发
D. 直接拜访
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