How can I create a Menu group after clicking a button?
我如何创建一个菜单组后，点击一个按钮？
Overall, the menu group made less than half as many errors as the typing group.
总的来说，菜单组比键入组少了将近一半的错误。
On this graph, the green bars represent the questions that could be answered with menus (for the "menu" group). The purple bars show the error rate on questions that both groups had to type.
图表中，绿条代表的是以菜单方式回答的答案的错误率(菜单组)，紫条显示的是两组以键入方式回答的答案的错误率。
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