在运用某种强化方式时,比较理想的做法就是在个体刚完成一次比较令人满意的行为后马上就加以强化。
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A user needs to create a trigger that will update table T2 whenever a row is added to table T1. Assuming the user has all appropriate privileges for table T2, which privilege is required on table T1 to create the trigger?()
A. REFERENCES
B. SELECT
C. UPDATE
D. ALTER
下列白肋烟等级中叶面平展的为()
A. C3
B1
C6
D. B5