单项选择题A． Microfilm is a tiny square film no bigger than your thumbnail.B．To borrow a microfilm you do not need to find out the call slip.C．You can read the materials on a microfilm directly.D．You must use a machine to read the material on a microfilm.

填空题with→to

填空题∧=less

填空题irrelevant

单项选择题A．Current issues are kept on the shelves.B．Back issues are bound together in volumes.C．The procedure of borrowing a back issue is slightly different from that of a book.D．Current issues of periodicals are put on microfilm.