【单选题】You _____ come, but why didn't you appear? [ ]
【单选题】When the library doesn't have the magazine you need, you______.
A.
have to go to another library for it
B.
can ask the librarian to buy a copy for you
C.
can ask the librarian to go to other libraries for it
D.
can borrow it from another library but don't have to go there
【单选题】You ________here tomorrow if you have something important to do. [ ]
【多选题】梗阻性肥厚型心肌病治疗中,最常用的药物是( )。
【简答题】采食量对动物生产效率有何影响?影响动物采食量的主要因素有哪些?
【单选题】—Have you brought with you? We won’t have time to come back. —Don’t worry. All the things we need are here, in this big bag.