phân tích các phương pháp lãnh đạo quản lý ( phương pháp lãnh đạo quản lý theo tình huống, theo chức năng, theo hệ thống)?

Which two statements are true about a system? 1. a system is a group of objects analyzed as one unit. 2. energy that moves across system boundaries is conserved. 3. there’s only one way to define the boundaries of a system. 4. all systems are made by humans.

Why are gold and platinum used for jewelry

When was napoleon banopart born?