题目内容

一台仪表在其规定的参比工作条件下使用时所产生的误差称为该表的基本误差。这种规定的参比工作条件即是正常工作条件或标准工作条件。

A. 正确
B. 错误

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依据《地下防水工程质量验收规范》(GB50208-2011)7.1.6渗排水、盲沟排水分项工程检验批的抽样检验数量,应按15%抽查,其中按两轴线间或10延米为1处,且不得少于3处。

A. 正确
B. 错误

In Recovery Manager (RMAN), you set the retention policy to NONE by executing the following command: CONFIGURE RETENTION POLICY TO NONE; What would be the impact of this setting?()

A. The retention policy is cleared.
B. RMAN does not consider any backup as obsolete.
C. The retention policy is set to its default setting of redundancy 1.
D. The retention policy is set to its default setting of recovery window 7.

简述农业的基本特性。

什么叫左值?

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