阿摩線上測驗
80. According to Anna Sfard, a mathematical concept can be conceived in two different ways: structurally and operationally. Which of the following is to view 
operationally?
(A)
as an irrational number.
(B)
as a symbol.
(C)
as an infinite decimal.
(D)
as taking a square root of 2.
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統計： A(1), B(0), C(1), D(3), E(0) #2320037
統計： A(1), B(0), C(1), D(3), E(0) #2320037
