图中可数出的三角形的个数为0z7T*h6f/B*X,z,K5s-z1~．6^;Z1`4x7]1o2['e:r)L9T3m+n/I,^'Y;Z-h
6^;Z1`4x7]1o2['e:r)L9T3m+n/I,^'Y;Z-h