能够燃烧的低压液化气体共有（）种。 ["5","6","17","25"]
Which three statements are true about adaptive SQL plan management?（） [" It automatically performs verification or evolves non-accepted plans, in COMPREHENSIVE mode when they perform better than existing accepted plans."," The optimizer always uses the fixed plan, if the fixed plan exists in the plan baseline."," It adds new, bettor plans automatically as fixed plans to the baseline."," The non-accepted plans are automatically accepted and become usable by the optimizer if they perform better than the existing accepted plans."," The non-accepted plans in a SQL plan baseline are automatically evolved, in COMPREHENSIVE mode, during the nightly maintenance window and a persistent verification report is generated."]
对于承受水平力的水利工程，应进行水平位移观测；有防渗要求的需进行（）的观测 ["正常蓄水位","防洪高水位","设计洪水位","测压管水位"]
可燃气体浓度（）爆炸下限时，即不着火也不爆炸 ["高于","低于"]
When IP Telephony is deployed for Teleworkers using the Cisco Business Ready Teleworker solution, which statements are true?（） ["There is lower bandwidth consumption for VoIP media streams.","Teleworkers can have the same extensions and inward-dialing numbers at their office desks and home offices.","Personal calls are routed directly through the residential PSTN line.","Teleworkers can have different extensions at their office desks and home offices.","There is less burden on Cisco CallManager for signaling traffic.","Incoming calls are first routed to the office desks, then to the home offices."]
教师为本。
