Whose storybook ____that?
-- Anna, could you lend me this book, please?
-- I'm sorry. I it for only two days, and I haven't finished it yet.
四个数－5，－0.1，12，3中为无理数的是( ).
青霉素是一种抗生素。几十年来，由于反复使用，致使某些细菌对青霉素的抗药性越来越强，请回答：
存的是
