易拉罐往往由铝制材料制成,铝的冶炼过程会耗费大量的(),与易拉罐相比,软包装生产和处理的过程更节能。
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Your company uses a SQL Server 2005 database. Customer data from your trading partners is imported into the Customers table every night. You need to ensure that the customer record is updated if it already exists in the Customers table. If the record does not exist, the data needs to be inserted into the Customers table. What should you do?()
A. Create a FOR trigger.
B. Create an INSTEAD OF trigger.
Create an AFTER trigger.
D. Create a DDL trigger.
网管及支撑系统专业管理类指标包括网管及支撑系统()完整性,采集数据的完整性、准确性和及时性,网管及支撑系统可用性,网元接入网管及支撑系统的及时率。
ZXD1500最大输出功率是()。
A. 1000W
B. 1500W
C. 1800W
D. 2000W