At the conference, people of different____were given a chance to exchange  theirs with each other.       [ ]

A. points        

B. manners      

C. views          

D. ways  

下列属于珠江三角洲生产的产品的有①电子电器②机械③日用消费品④造船[ ]

A．①③

B．③④

C．②③

D．①④