【判断题】适用于用电信息采集系统的远程通信网络主要有配电光纤专网,GPRS、CDMA、3G等无线公网,230MHz负荷管理专用无线专网,低压电力线载波、微功率无线等网络,主站可以同时支持各种通信信道类型。
【判断题】STM-N 的N 的取值可以是1、4、8、16等。
【判断题】铺贴前应确定水平及竖向标志,垫好底尺,挂线铺贴。墙面砖表面应平整,接缝应平直、缝宽应均匀一致。阴角砖应压向正确,阳角线宜做成45°角对接。在墙面突出物处,应整砖套割吻合,不得用非整砖拼凑铺贴。
【单选题】将 7g 结晶草酸(C2O4H2.2H2O )配成质量分数为 0.05 的草酸溶液,需加溶剂水( )。
【单选题】Consumer products refer to ________.
A.
products purchased by consumers for further processing or for use in conducting a business
B.
primarily intangible offerings from marketers
C.
raw materials as well as manufactured materials and parts
D.
products and services bought by final consumers for personal consumption
【判断题】微功率无线主要用于用电信息采集系统远程通信。
【单选题】Consumer products refer to ________.
A.
products purchased by consumers for further processing or for use in conducting a business
B.
products and services bought by final consumers for personal consumption
C.
primarily intangible offerings from marketers
D.
raw materials as well as manufactured materials and parts
E.
products that aid in the consumer's production or operations, including installations and accessory equipment