关于2，官方FAQ上有写，原文如下：
“Q. On the Dig-In card, it says, "Issue an order to 4 Infantry units. The units improve their position by..."Since the card says the Infantry receive an order, does that mean they can move and fire in addition toplacing sandbags?
A. No. They may only place the sandbags, no movement or combat.”
所以说viper解答的没错。
