20 世纪 80 年代末 90 年代初 , 东欧剧变、苏联解体 , 社会主义事业遇到了严重的挫折。东欧剧变、苏联解体的实质是 ( ) A. 领导人变化 B. 阶级关系变化 C. 社会制度变化 D. 执政党变化
A.
B.
C.
D.
D
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【单选题】You opened the encryption wallet and then issued the following command: SQL>CREATE TABLESPACE securespace DATAFILE ’/home/user/oradata/secure01.dbf’ SIZE 150M ENCRYPTION USING ’3DES168’ DEFAULT STO...
A.
It creates the table and encrypts the data in it.
B.
It generates an error because the wallet is closed.
C.
It creates the table but does not encrypt the data in it.
D.
It generates an error because the NO SALT option cannot be used with the ENCRYPT option.
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