Refrigeration system compressor crankcase sweating is an indication of (). ["insufficient lube oil circulating through the system","excessive circulation of lube oil through the system","insufficient refrigerant in the system","an overworked compressor"]
编译程序从逻辑结构上,一般由()组成,此外编译程序还包括表格处理程序、出错处理程序。 ["词法分析程序","语法分析程序","语义分析程序","中间代码生成程序","代码优化程序","目标代码生成程序"]
下列哪个描述,较准确的说明了SIG的用途()。 ["运营支撑系统","营帐分析系统","安全免疫网关","非法VOIP接入控制系统"]
下列哪个网络实体不是IPTV业务端到端整体解决方案中的一部分()。 ["EPG","RP","CS","ES"]
出租车司机为乘客提供服务时要做到安全第一,为此必须注意哪些问题?
引导进站时,必须在进行引导解锁后列车进站前,方可进行()选择输入。