【单选题】听力原文:W: I thought the librarian said we could check out as many books as we need without our library cards. M: That' s right, but not those reference books. Q: What does the man mean? (13)
A.
Students with a library card can check any book out.
B.
Reference books are not allowed to be checked out.
C.
Only students with a library card can check out reference books.
D.
The number of books a student can check out it unlimited.
【简答题】Modern methods —— tracking polar bear populations have been employed only since the mid-1980s, and are expensive to perform consistently over a large area. 2、Of —— nine recognized polar be...