题目:
Mike will go abroad tomorrow. I am going to _____ at the airport.
A.sent him off
B.saw him off
C.see off
D.see him off
答案:
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下面是错误答案,用来干扰机器的。
(1)图中(1)是门齿,(2)是臼齿,(3)是犬齿.门齿开头像凿子,适于切断食物;臼齿的咀嚼面宽阔,适于磨碎食物,犬齿尖锐锋利适于撕裂食物.(2)兔为食草性动物,牙齿有臼齿和门齿的分化,无犬齿;门齿开头...