养子女与生父母及其他近亲属间的权利义务关系，因（）的成立而消除。
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美发企业的公共关系活动主要是以顾客为核心而开展的一系列（）活动。
锯齿的粗、细以每25mm长度内的齿数而定：14～16个齿为粗齿锯条；22个齿为中齿锯条；32个齿为细齿锯条。
A. 正确
B. 错误
流动阻力的大小与流体本身的物理性质、（）及壁面的形状等因素有关。
A. 流速
B. 流动状况
C. 流量
D. 运动黏度
You decided to change the location of the flash recovery area. You executed the following command： Which statement is true？（）
A. The location can be changed only if the flash recovery area is empty.
B. After executing the command， all new flash recovery area files will be created in the new location.
C. The command will generate an error because you cannot change the flash recovery area while the database is open.
D. All the existing files in the flash recovery area will be moved to the new location， and all new Flash Recovery Area files will be created in the new location.
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