我在尝试使用Google Charts API构建带注释的时间轴图时遇到了一个问题。--Load the AJAX API-->
<script type="text/javascript" src="https://www.google.com/jsapi"></scriptwhen the Google Visualization API is
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<script type="text/javascript" src="https://www.google.com/jsapi"></scriptAPI and the package.the Google Visualization API is loaded.= new google.visualization.
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<script type="text/javascript" src="https://www.google.com/jsapi"></scriptand the gantt chart package.Visualization API is loaded.var data = new google.visualization.DataT