【单选题】
What（）the population of the USA?
A、is
B、are
C、have
D、has
查看正确答案A、twentyone century B、the twentyone century C、the twentyfirst century D、twentyfirst century
搜题
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第6题
A、 The code will run a backup validation to populate the V$BACKUP_CORRUPTION view and repair corrupt blocks， if any， recorded in the view. B、 The code will run a backup validate to populate the V$COPY_CORRUPTION view and then repair any corrupt blocks recorded in the view. C、 The code will runs a backup validate to populate the V$DATABASE_BLOCK_CORRUPTION view and then repair corrupt blocks， if any， recorded in the view. D、 The code will run a backup validate to populate the RC_BACKUP_CORRUPTION view and then repair corrupt blocks， if any， recorded in the view.
