If you click on Courseware you will get to this menu, the first of which preferences is Periodic Table.
如果你点击课件,就会来到这个菜单,第一个选择就是周期表。
麻省理工公开课 - 固态化学导论课程节选
And we had a bunch of drop downs I was able to choose from.
这儿有一些下拉菜单可供选择。
哈佛公开课 - 计算机科学课程节选
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