题目内容

关于食物中毒，下列描述不正确是（）。

A. 食物中毒是指摄入了含有生物性、化学性有毒有害物质的食品或把有毒有害物质当作食品摄入后所出现的非传染性急性、亚急性疾病
B. 食物中毒包括暴饮暴食引起的急性肠炎
C. 食物中毒不包括食源性肠道传染病和寄生虫病
D. 食物中毒属于食物源性疾病的范畴

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有多余约束的体系一定是几何不变体系。

A. 正确
B. 错误

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You are implementing transaction log shipping for a database named DB1 from a server named SQL1 to a server named SQL2. Because DB1 is 100 GB in size， it is too big to transfer over the network in a reasonable amount of time. You need to minimize the impact on the network while you initialize the secondary database. Which two actions should you perform？（）

A. Specify the simple recovery model for DB1.
B. Specify either the full or the bulk-logged recovery model for DB1.
C. Perform a complete backup of DB1 to portable media. Restore the secondary database from that backup； specify the RECOVERY option.
D. Perform a complete backup of DB1 to portable media. Restore the secondary database from that backup； specify the STANDBY option.
E. Before you activate transaction log shipping to the secondary database， execute the following statement on the primary server.BACKUP LOG DB1 WITH TRUNCATE ONLY

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变电站应具备哪些记录薄？

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形成动机的主要因素包括（）。

A. 需要
B. 兴趣
C. 理想
D. 信念
E. 诱因

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