日常生活中用到的下列物质，其中属于纯净物的是

A．取暖用的煤

B．炒菜用的铁锅

C．降温用的冰水

D．调味用的白酒

The records of S.H.E are____ being bought, for their songs can bring energy into us.

A．worthy

B．worth

C．worthwhile

D．worthy of