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Let L be a type II1 factor with separable predual and τ a normal faithful tracial state of L.We first show that the set of subfactors of L with property Γ,the set of type II1 subfactors of L with similarity property and the set of all McDuff subfactors of L are open and closed in the Hausdorff metric d2 induced by the trace norm; then we show that the set of all hyperfinite von Neumann subalgebras of L is closed in d2.