冲压加工的对象主要以（ ）材料为主。

A．It’s not a simple matter to determine the nature of talent．B．Sports team owners spend millions of dollars at t racting top talentC．The group interaction and its effect drew the researchers’ attention． D．Stars apparently do not follow this basi c principle of sportsmanship． E．Several recent studies examined the role of talent in the sports worlD．Building up a dream team is more complex than simply hiring the best talent． G． This task interdependence distinguishes baseball from football and basketball．．D．Stars apparently do not follow this basi c principle of sportsmanship．E．Several recent studies examined the role of talent in the sports worlD．F．Building up a dream team is more complex than simply hiring the best talent． G． G． This task interdependence distinguishes baseball from football and basketball．．

A、95%
B、80%
C、75%
D、60%