影响施胶的因素有()、PH值、()、水质的影响、()和纸机抄造的影响。
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You have not configured Oracle Managed Files (OMF) in your database. You do not want to scan the entire datafile every time an incremental backup is performed. You decide to enable the block change tracking feature. Which statement should you use to enable the block change tracking feature?()
ALTER DATABASE ENABLE BLOCK CHANGE TRACKING
B. ALTER SYSTEM ENABLE BLOCK CHANGE TRACKING USING FILE
C. ALTER DATABASE ENABLE BLOCK CHANGE TRACKING USING FILE
D. ALTER SYSTEM ENABLE BLOCK CHANGE TRACKING
广州市某中学的一名中学生,因病重住进了医院,但家庭贫寒没钱医治,同学们知道后,都纷纷为他捐款看病。这一行动说明()
A. 为国分忧,勇挑重担是公民义不容辞的责任
B. 社会需要关爱,人们需要互帮互助
C. 个人离不开集体
D. 个人与集体相互依存