人生发展需要不断通过()和学习提高能力。
A. 实验
B. 实践
C. 工作
D. 体验
YourdatabaseinrunningintheARCHIVELOGmode.Youissuethefollowingcommandtobackupdatafile2inyourdatabase.RMAN>COPYDATAFILE2TO’D:\ORACLE\ORA90\MYNEWDB\DA2.DBF’;Whichtwostatementsaretrueregardingthebackupcreatedusingthiscommand?()
A. ThecopyofthedatafilecreatedisstoredintheRMANrepository.
B. ThecopyofthedatafilecreatedcanbeviewedusingtheLISTBACKUPcommand.
C. ThecopyofthedatafilecreatedusingthisCOPYcommandcanbeplacedonlyonthedisk.
D. ThecopyofthedatafilecreatedissimilartothebackupofthefilecreatedusingtheBACKUPcommand.
E. Thecopyofthedatafilecreatedcanbeusedforrecoveringthedatabaseusingtheuser-managedrecoverymethod.
生物进化论的创始人达尔文说:“大自然一有机会就要说谎的。”例如一根直的木棍,半截插入水中,看上去就像是弯曲的。这说明()
A. 本质离不开现象
B. 现象离不开本质
C. 假象否定了事物的本质
D. 假象也是事物本质的表现
诚实劳动是指()①自觉守法,不搞歪门邪道②热爱本职岗位,不见异思迁③踏实肯干,不虚荣浮躁④锐意创新,不固步自封
A. ①②③
B. ②③④
C. ①②④
D. ①②③④