求助，请问大佬们
为什么
Plot[BDCF5, {K, -1, 1}]能画出来，但是
AP1 = ParametricPlot3D[{{K, -5, BDCF5}, {K, -4, BDCF4}, {K, -3,
BDCF3}, {K, -2, BDCF2}, {K, -1, BDCF1}, {K, 0, BDC0}, {K, 1,
BDC1}, {K, 2, BDC2}, {K, 3, BDC3}, {K, 4, BDC4}, {K, 5,
BDC5}}, {K, -1, 1}]
变成三维就画不出来呢？其中BDC0-5都能画出来二维线图