Sets the specified TAB as the active TAB.

设置特定的tab为活动面板。

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To make the active TAB more obvious, we're going to give it a faded white background.

为了使活动的切换页更加明显，我们将给它添加渐白的背景。

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To make the active TAB more obvious, we're going to give it a faded white background.

为了使活动的切换页更加明显，我们将给它添加渐白的背景。

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