试述关节松动术的作用。
幼儿园组织设置的显性目的是（） ["实现幼儿园的工作目标","幼儿园可以实现经济效益","幼儿园的保教质量的提高","为每个工作成员在职业上的成长和自我实现提供条件"]
When building the job stream MASTER#NEW_STREAM in the composer command line， which option should be used to apply the settings in the Variable Table "LIVE_VARS" to be associated to the jobs in the job stream？（） ["A","B","C","D"]
You dropped a schema of a user in an Oracle 10g by mistake. You decide to flash the database back to its previous state to restore the deleted schema. Which process writes the before images of the physical database blocks to the flashback database logs？（） [" LGWR"," DBWR"," MMON"," RVWR"]
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