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【多选题】
具有系膜的器官是A.
阑尾
B.
空肠
C.
回肠
D.
横结肠
E.
盲肠
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举一反三
【单选题】听力原文：M: If you had waited until after the Christmas holidays, you could have bought that dress for much less. W: I know that, but I needed it immediately. I had a wedding reception to attend. When had...
A.
Shortly after Christmas.
B.
In the spring.
C.
During the Christmas season.
D.
During the sale.
【简答题】鸟类的特殊发声器官是 ，由气管特化而形成的，位于气管与支气管的交界处。（答案为两个字）
【简答题】正多边形--快捷键命令为
【简答题】鸟类的特殊发声器官是 ，由气管特化而形成的，位于气管与支气管的交界处。
【简答题】Could you please tell me where you bought the shoes you _______ yesterday? A．tried on B．put on C．had on D．pulled on
【单选题】─ When ____ you ____ the bike? ─ Last month. [ ]
A.
have / bought
B.
had / bought
C.
do / buy
D.
did / buy
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