The procedures for a vies to answer first device Among them the host control S12 and S13 two buttons.

本程序为一抢答器；其中主持人操控s12与S13两个按键。

youdao

The procedures for a vies to answer first device Among them the host control S12 and S13 two buttons.

本程序为一抢答器；其中主持人操控s12与S13两个按键。

youdao