Therefore, it's a good habit to use a waitForExistence method when you open a browser. One way to do this is to use a Wait for Selected TestObject verification point

因此，当您打开一个浏览器时使用 waitForExistence 程序是很好的办法。

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An analog maximum power point tracking (MPPT) controller integrated circuit (IC) based on open-circuit voltage method was proposed to enhance the photovoltaic conversion efficiency of solar cell.

为提高光伏电池的光电转换效率，设计一种基于开路电压法的光伏电池最大功率点跟踪(MPPT)控制芯片。

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Using high jumping-off point and open new knowledge system, electron teaching flat is set up base on network technology by teaching method of subject.

从建设高起点、开放式的新知识体系入手，通过“主题法教学法”； 应用网络技术建立电子教学平台；

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