• 2022-10-29
    以下可重入表中哪些是循环表?
    A: (L1: (L2: (L1, a)))
    B: D(A:(c), B:(e), C:(a, L:(b, A, d)))
    C: (L: (a, L))
    D: (L1:(a, b), (L1, c, L2:(d)), (L2, e, L3:(f, g)), L3)
    E: (L1: (a, b, L2(x, y)), L2, L3: (s, t, L4:(q, L5:(w, L3, v), r)))
    F: (x1, (y1, (a1, a2), y3), x3, (z1, z2))
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