after ios 11 update my iphone 7 automatically turns on its wifi bluetooth mobile data air drop which is very annoying

This is what it was designed to do: Use Bluetooth and Wi-Fi in Control Center with iOS 11 - Apple Support

This is a user-to-user support forum. You may want to also provide feedback to Apple via Feedback - iPhone - Apple

I had this problem at the beginning. however it is easy to fix. You should turn bluetooth and wi-fi from settings. if you try to turn them off by clicking on them in control center they actually do not turn off they just disconnect from know connections and after while they will again start connection to other wi-fi or bluetooth connection .

best way to solve it is only to turn them off from Settings