What is the original meaning of "birdbrained" and what does it mean here in the first para
正确答案
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What is the original meaning of "birdbrained" and what does it mean here in the first paragraph？
A．Naive; intelligent.
B．Simple-minded; volant.
C．Narrow-minded; navigational.
D．Stupid; adapted for flight.
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正确答案：D
birdbrained原指“愚蠢的”意思，但在本文中却是指具有适应飞行的能力。第1段最后一句表明始祖鸟拥有使其飞翔的东西，结合第4段“科学家总结，耳内控制平衡的半规管的测量显示始祖鸟拥有为了飞翔所必需的神经的和结构的相应改造”，我们可以得知，D为正确答案。