[問題]2000年1月考古題 文法 Q20

[molecular]

Polar bears are bowlegged and pigeon-toed, adaptations that enable this massive animals to maintain their balance as they walk.

The answer is (B)

但我想請問此處的adaptations是bowlegged and pigeon-toed的同位
語嘛? 可是bowlegged and pigeon-toed是形容詞, 怎可用名詞來當同位語呢? 如果不是, adaptations後面這句明顯是從屬子句, 所以也不可能當主辭呀!? 那它的定位是...?

Thanks

[micki]

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