Generally, you can find the whole textbook by scanning the code of college students' APP in the library. This APP covers more than 1000 textbooks, including mathematics, English and college physics. The answers in four-year college textbooks are very easy to find. Moreover, it has detailed answer analysis, as well as the functions of converting pictures into words, translating photos into voice, data and so on, which is especially suitable for college students.

Baidu Library College Student APP can be found by direct search. Recently, you can find the answers in the book with the college student APP, and the analysis content is thorough. Yes, I searched out the questions and answers directly.