理论上表达式str(sqr(b*b-4*a*c))的类型是______.(A)integer (B)Double (C)string (D)boolean
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![理论上表达式str(sqr(b*b-4*a*c))的类型是______.(A)integer (B)Double (C)string (D)boolean](/uploads/image/z/7151345-17-5.jpg?t=%E7%90%86%E8%AE%BA%E4%B8%8A%E8%A1%A8%E8%BE%BE%E5%BC%8Fstr%28sqr%28b%2Ab-4%2Aa%2Ac%29%29%E7%9A%84%E7%B1%BB%E5%9E%8B%E6%98%AF______.%EF%BC%88A%EF%BC%89integer+%EF%BC%88B%EF%BC%89Double+%EF%BC%88C%EF%BC%89string+%EF%BC%88D%EF%BC%89boolean)
理论上表达式str(sqr(b*b-4*a*c))的类型是______.(A)integer (B)Double (C)string (D)boolean
理论上表达式str(sqr(b*b-4*a*c))的类型是______.
(A)integer (B)Double (C)string (D)boolean
理论上表达式str(sqr(b*b-4*a*c))的类型是______.(A)integer (B)Double (C)string (D)boolean
(C)string