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  • 枫下沙龙 / 谈天说地 / 一个语法:Collagen,a (strong) rubbery protein,(supports the) ear flaps and the tip (of nose) in (humans). 哪个错?
    • D
      • why?and how to correct it?
        • In my opinion, it should be IN HUMAN.
          • you can read the following statements
            A (deficient) of folic acid (is rarely found) in humans (because) the vitamin is contained (in a) wide variety of foods.

            it is one of structural questions in toefl test of 98.2
            • Yeah, then Bird is right.
    • b --> supports ear flags of...
      • -->supports ear flags and the tip. ...