以下是关于【元素周期律】的公开课/优质课视频，一共55个
21:1027-
17:1535 -
17:17116 -
43:2095 -
17:40127 -
21:0444 -
17:2374 -
55:2795 -
52:21126 -
45:5050 -
1:27:0355 -
42:10110 -
1:37:4938 -
50:3478 -
53:23106 -
1:28:36128 -
49:49111 -
1:36:01112 -
47:4946 -
59:1042 -
48:2777 -
49:15103 -
1:34:3819 -
59:56122 -
43:56112 -
57:5872 -
20:19136 -
36:0793 -
43:2016 -
07:376 -
08:4227 -
09:13122 -
07:1767 -
43:1380 -
48:13135 -
43:20130 -
17:14121 -
43:2090 -
48:11104 -
55:16131 -
41:0659 -
44:04129 -
41:0653 -
07:02107 -
39:0762 -
41:465 -
46:4570 -
41:1680 -
44:215 -
40:3825 -
43:3486 -
35:329 -
47:13104 -
39:3679 -
12:1664