（新）买卖合同中标的物交付之后产生的孳息物，归（）。
A. 买受人所有
B. 出卖人所有
C. 买受人和出卖人共有
D. 属于无主财产
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（）即社会主义全民所有制经济，是国民经济中的主导力量。
A. 国营经济
B. 国有经济
C. 集体经济
D. 股份制经济
Which two statements are true when row archival management is enabled?（）
A. The ORA_ARCHIVE_STATE column visibility is controlled by the ROW ARCHIVAL VISIBILITY session parameter.
B. The ORA_ARCHIVE_STATE column is updated manually or by a program that could reference activity tracking columns, to indicate that a row is no longer considered active.
C. The ROW ARCHIVAL VISIBILITY session parameter defaults to active rows only.
D. The ORA_ARCHIVE_STATE column is visible if referenced in the select list of a query.
E. The ORA_ARCHIVE_STATE column is updated automatically by the Oracle Server based on activity tracking columns, to Indicate that a row is no longer considered active.
用真空法脱气进行色谱分析时，需考察脱气装置的脱气效率。
A. 正确
B. 错误
计算增值税时，一般纳税人应纳税额的计算公式为（）。
A. 应纳税额=当期销项税额+当期进项税额
B. 应纳税额=当期销项税额-当期进项税额
C. 应纳税额=销售额×税率
D. 应纳税额=买价×税率
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