A、Photocopy service. B、Enlarger. C、Computer service. D、Typewriter. C文章的最后提到图书馆提供复印机、放大复印机、缩微胶卷播放器、打印机等设备，但没有提到电脑设备，故选C项。

Welcome to the College Library service. We have a well-stocked bank of resources, which are in two main locations. (29) One is the library itself, with books and periodicals; the other is the self-access language center, with audio and video material.
     We have two main sections for the books and another for periodicals and journals. The books are in two categories: those for general loan and those for reference. (30) General loan books are all on the first floor and they can be borrowed for three weeks by full-time students. Upstairs you will see our reference section.  (30) The reference section includes current abstracts and indexed journals, general and special bibliographies,  indexes, general English and European language encyclopedias, a complete set of British Standards, substantial collections of British government publications and sets of maps of Scotland, all in addition to other reference material of a general and specialized interest. As you know, (30) reference books may not be taken out of the library under any circumstance.
     (30)The Library tries to provide as full selection as possible of supplementary reading material. Students are expected to buy prescribed textbooks and copies of these are usually only held in the reserve collection on the ground floor for study use only within the library. They can’t be taken out of the library. (31) An inexpensive photocopy service is provided in the library and facilities are available to produce enlarged copies from microforms. Other equipment available includes microfilm readers, engineering drawing boards, a light table, tape slide units and typewriters.