question: lan:computer:file sharing
choices.label: A B C D
choices.text: space station:astronaut:science experiment library:reading room:literature retrieval textile factory:textile equipment:raw material processing tv station:network media:program production
explanation: "lan" refers to a group of computers interconnected by multiple computers in a certain area. "computer" is a necessary device for "lan". through "lan", "computer" can be used for "file sharing". "lan", "computer", "file sharing" are somehow related. an "astronaut" is a person working on a "space station". an "astronaut" is not a piece of equipment. the "reading room" is a place in the "library", and the "reading room" is not an unnecessary facility of the "library". "textile equipment" is the necessary equipment of a "textile factory", and "textile equipment" is used in "textile factory" to carry out "raw material processing". "textile equipment", "textile factory" and "raw material processing" have some related "network media" is not a necessary device for "tv stations".
relation: lan computer file sharing R3.10
relation: textile equipment textile factory raw material processing R3.10