配送所包含的那一部分运输，在整个运送过程中是处于（）的位置。
A、二次运输
B、支线运输
C、终端运输
D、接单
参考答案：A, B, C
The Jiangsu TV station is very popular with many people in China, as it deals with sub-jects such as music, entertainment and fashion.
A．precise
B．diverse
C．casual
D．regular
弧焊整流器是采用硅二极管或（）作整流器的直流弧焊电源。
