工频参考电流下的工频参考电压测量应在被试设备处于()下进行。
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在混凝土中凡粒径为0.15~5mm的沙子称为细骨料,大于5mm的称为粗骨料。
A. 正确
B. 错误
调频发射机预加重是多少uS?为什么要进行预加重及去加重技术措施?
设计铸件壁厚时,不能仅依靠增加厚度作为提高承载能力的唯一途径。
A. 正确
B. 错误
You administer a SQL Server 2008 instance. The instance hosts a database that is used by a Web-based application. The application processes 15,000 transactions every minute. A table in the database contains a column that is used only by the application. This column stores sensitive data. You need to store the sensitive data in the most secure manner possible. You also need to ensure that you minimize the usage of memory space and processor time. Which encryption type should you use?()
A. Symmetric key encryption
B. Asymmetric key encryption
Certificate-based encryption
D. Transparent data encryptio