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【单选题】
目前我国流行的鸭病毒性肝炎病毒的主要血清型为OA.
1型
B.
2型
C.
3型
D.
1和2型
E.
1,2和3型
拍照语音搜题，微信中搜索"皮皮学"使用
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知识点：
皮皮学刷刷变学霸
举一反三
【单选题】客观规律性与主观能动性统一的基础是()。
A.
规律；
B.
规律；
C.
意识；
D.
意识；
E.
人；
F.
人；
G.
实践。
H.
规律；
I.
意识；
J.
人；
【单选题】— Which do you prefer, the red one or the green one? — will do. Just pack one for me, please. [ ]
A.
Both
B.
Either
C.
Neither
【简答题】设f(x)可导且f'(x 0 )=-2，则△x→0时，f(x)在点x 0 处的微分dy与△x比较是______无穷小．
【简答题】Think for a moment about the teachers you have had at school or at university. Which one did you like best? And Why? Were the teachers you liked best also the ones who were the best teachers, in yo...
【单选题】- Which do you prefer, the red one or the green one? -________ will do. Just pack one for me, please. [ ]
A.
Both
B.
Either
C.
Neither
D.
Any
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