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题库 / Prep2007E2-SC-120
Although the turtle has been toothless for more than 150 million years, in some contemporary turtle species the moderately sharp and jagged edges of their horny jaws function for teeth.
their horny jaws function for teeth
its horny jaws function for teeth
its horny jaws function as do teeth
the horny jaws function as teeth do
the horny jaws function as teeth
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Horny jaws function as do teeth.= Horny jaws function as teeth do .还原以后就是horny jaws function as teeth function. 下颚实现的功能和牙齿实现的功能一样。
Horny jaws function as teeth. 下颚充当了牙齿，下颚是牙齿的替代品
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