口蹄疫是单蹄兽的一种传染病。
参考答案:错
giving a general introduction to the computer, the course also provides practical experience. [ ]
A. In addition to
B. Except
C. Except for
D. Beside
鸦片类毒品主要有()。
A、鸦片
B、吗啡
C、海洛因
D、冰毒