30. What is the how-to list about?
(A) How to join 2ndHandBooks.
(B) How to buy books from 2ndHandBooks.
(C) How to sell books through 2ndHandBooks.
(D) How to send back books that are bought through 2ndHandBooks.
答案:登入後查看
統計: A(2), B(3), C(26), D(0), E(0) #3263625
統計: A(2), B(3), C(26), D(0), E(0) #3263625