终端复用器与分插复用器之间称为（）。

A、沿程温降速度较输油管快The temperature drop speed along the pipeline is faster
B、下游管道温度低于环境温度The downstream pipeline temperature is lower than the ambient temperature
C、沿程温降速度较输油管慢The temperature drop along the pipeline is slower than that along the pipeline
D、下游管道温度高于环境温度The downstream pipeline temperature is higher than the ambient temperature

A、吸引群众目光
B、宣传品牌的形象
C、培养用户的感情
D、增进顾客的交流