以下是关于【挑战第一次】的公开课/优质课视频，一共40个
31:4162-
19:04115 -
31:1467 -
44:33133 -
36:58125 -
38:4882 -
39:2428 -
41:075 -
39:3640 -
37:3260 -
39:5988 -
40:5381 -
39:5111 -
39:43108 -
40:0012 -
40:0796 -
39:3039 -
38:0286 -
40:3495 -
40:12117 -
39:02104 -
36:2744 -
39:5770 -
39:1017 -
39:5566 -
38:5979 -
38:385 -
36:55110 -
40:0290 -
42:5051 -
38:3385 -
40:3375 -
35:3553 -
43:0770 -
31:43109 -
30:5254 -
39:53116 -
43:27111 -
47:516 -
45:03110