There isn't much to handling the pressing of control keys (Shift, Alt, and Ctrl). You need to ignore these keyboard events by doing the following.
对于控制键(Shift、Alt和Ctrl)的按键事件并不需要过多的处理。
2
Moving company handling company logo on the workers should wear the uniform, wearing leader mark shift team leader; the language of civilization to the customer, be polite.
搬家公司搬运工人应统一穿着印有公司标志的工作服，带班组长佩戴组长标志；对客户用语文明，礼貌待人。
3
Follows operational procedures, including those for cash handling and safety and security, to ensure the safety of all partners during the shift.