下列哪个面向对象程序设计不同于其他语言的主要特点

A．继承性

B．消息传递

C．多态性

D．静态联编

The commander of a rescue unit designated to co-ordinate search and rescue operations within a specified area is the（）.

A.General commander

B.Commander general

C.Search commander

D.On-scene commander