Paper-cut art is a kind of artistic displays in the Mid-Autumn Festival.
查看答案
建筑电气中将电子技术用电系统，如火灾自动报警系统、电话通信、闭路监控电视、共用天线电视与卫星电视接收、扩声与同声传译、综合安防系统、楼宇自动化系统、综合布线等称为弱电系统。
ETCS-3系统取消了区间的轨道电路，采用准移动闭塞。
对局线调度专用网用户的电话号码编号时，后三位CDE为调度局向号。
With time going by, the customs of the Cold Food Feast were gradually integrated into the Qingming Festival.
微信支付 
支付宝支付