黄缘龟冬眠前准备，首先是要黄缘龟停止吃食，为冬眠做清肠调理。接着是检查黄缘龟的体质问题是不是正常，最后是提前给黄缘龟制造良好的冬眠环境，这里主要指外部温度。
in my application i am trying to get the checkbox which is in the gridview i use the foreach control but it is shoing null this is my code./..
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