题目

任务型阅读 If you were like most kids, your mother told you there were three no-no's when it came to your fingers: Don't put them in an electrical outlet, don't stick them up your nose ( at least not in public ), and don't use them when you are counting.But experts in education and cognition now believe that using your fingers to do math is not only a perfectly good idea but may even help children become superior students. It certainly makes sense. When children count on their fingers, they take an abstract concept— mathematics—and translate it into the most basic and visual form. Eve某草原上苍鹰的种群密度的大小可采用的调查方法是    A．总数量调查法    B．标志重捕法    C．样方法        D．无法估测