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【简答题】
什么是鸭的病毒性肝炎病?其有何特征、临床症状和病理变化?
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举一反三
【单选题】The American Constitution, the oldest written one in the world, started to take effect in
A.
1736.
B.
1789.
C.
1798
D.
1769
【单选题】China is one of ___ in the world. [ ]
A.
the oldest country
B.
the oldest countries
C.
much older country
D.
much older countries
【单选题】Xi’an is one of capital in China.
A.
older, city
B.
the older, city
C.
oldest, cities
D.
the oldest, cities
【单选题】Beijing is one of ______ in China.
A.
the oldest city
B.
an old city
C.
the oldest cities
D.
the old city
【简答题】常见的点阵显示模块有 、 和 结构。
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