道路运输易燃易爆作业现场必须严禁烟火，作业现场应划定警戒区，一般半径____m内不得有热源或明火。

A.10 

B.15 

C.30

A project team is suffering from misunderstandings between team members who have different cultural backgrounds．The project manager is evaluating how to improve communication and collaboration．Which of the following statements is not true ？（）

A．Only those who realize that cultural differences are a resource to be fully utilized will survive in international project busines

B．There is a common ground for people from different cultures on which they can interact without unsolvable conflict

C．Cultural differences will always remain an obstacle to be overcome for cross-cultural project

D．Cross-cultural competence is a critical lever for competitive advantage in international project busines