You have configured OMF in your database. You enabled the ALTER DATABASE ENABLE BLOCK CHANGE TRACKING; statement to enable the block change tracking feature. What information will be written in the change tracking file?()
A. the system change number
B. the locations of the redo log files
C. the locations of the datafiles
D. the physical location of all the database change
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白血病发病情况说法错误的是()
A. 白血病发病在儿童和青少年的恶性肿瘤中居首位
B. 欧美国家白血病发病率较我国为高
C. 我国多种白血病中以急性粒细胞白血病为多见
D. 急性淋巴细胞白血病发病率成人与儿童接近
E. 我国慢性粒细胞白血病比慢性淋巴细胞白血病多见,而欧美国家则相反