question: computer:e-mail:photo
choices.label: A B C D
choices.text: brush:chinese painting:copybook truck:goods:refrigerator air conditioner:temperature:cold air mobile:text message:multimedia message
explanation: the carrier for storing "e-mail" and "photo" is "computer", and "e-mail" is a virtual object. a "brush" can be used to draw "chinese painting", but the "brush" is not a storage medium. the carrier for transporting "goods" and "refrigerators" is "trucks", but "goods" is a concrete thing, not a virtual thing. the carrier of "temperature" is not "air conditioner". the carrier for storing "text message" and "multimedia message" is "mobile phone", and "text message" is a virtual object.
relation: e-mail computer R3.10
relation: photo computer R3.10
relation: text message mobile R3.10
relation: multimedia message mobile R3.10