筒式封堵头采用（）的方式进行封堵。 机械膨胀。 液压。 气动。 自然膨胀。
两台变比相同的电流互感器，当一次线圈串联，二次线圈也串联使用时，测量总的变比为（）。 增加一倍。 减小一倍。 不变。
You need to create a data block for DML operations in the NEW_EMPLOYEE form module. Which data source can you use for this block?（） REF cursor query. 。 Stored function. 。 From clause query. 。 Transactional trigger.。
A customer wants to deploy the Cisco Business Ready Teleworker solution, but is currently using a traditional (non-IP) PBX for voice services. What would you recommend to this customer?（） Deployment of Business Ready Teleworker with VoIP is not recommended.。 The customer’s existing PBX must first be replaced with Cisco IP Telephony solution.。 Business Ready Teleworker and Cisco IP Telephony can be deployed in parallel to the existing PBX， integrating the two with trunking.。 Deployment is recommended only for full-time Teleworkers who have no other corporate phone.。
高压液化气体指临界温度（）。 ＜-10OC。 ≥-10OC≤70OC。 3≥-10OC。 ＞70OC。
Which two statements are true about Oracle JRockit Mission Control （JRMC） ？ （）
