GB7512--2006《液化石油气瓶阀》明确规定了瓶阀的结构型式必须是（）拆卸式。 可；。 不可；。 都可以。
You added a PHONE_NUMBER column of NUMBER data type to an existing EMPLOYEES table. The EMPLOYEES table already contains records of 100 employees. Now, you want to enter the phone numbers of each of the 100 employees into the table. Some of the employees may not have a phone number available. Which data manipulation operation do you perform? （） MERGE。 INSERT。 UPDATE。 ADD。 ENTER。 You cannot enter the phone numbers for the existing employee records.。
无形资产评估的目的有以下类型（）。 无形资产的转让。 无形资产投资。 无形资产摊销。 无形资产纳税。
跨度≤2m的悬臂板、梁钢筋混凝土结构的承重模板，应在混凝土达到强度的（）后（按混凝土设计标号的百分率计），才能拆除。 70%。 80%。 90%。 100%。
A prospective customer has selected Fiber Channel (FC) for performance reasons. The prospect does not appear to understand the terminology and options of the fiber channel but is very interested in learning before investing money in this technology.What steps should be taken to make sure the customer is satisfied with the solution?（） Send customer links to documentation for the FC components included in the solution 。 Direct the customer to Red Books and White Papers on FC technologies 。 Work with business partner to include Lab Services engagement to setup FC environment and perform knowledge transfer 。 Switch to iSCSI。
三相交流异步电动机采用能耗制动时，应采取的方法是（）。
