【多项选择题】
You are implementing an ASP.NET AJAX page. You add the following control to the page.<img src="https://img.ppkao.com/2018-07/lina/201807261655462965.jpg" /><br /> You need update the contents of the UpdatePanel without causing a full reload of the page. Which two actions should you perform?（）<p> You are implementing an ASP.NET AJAX page. You add the following control to the page.<img src="https://img.ppkao.com/2018-07/lina/201807261655462965.jpg" /><br /> You need update the contents of the UpdatePanel without causing a full reload of the page. Which two actions should you perform?（）</p>
A、A.Add the following control before the UpdatePanel.
B.Add the following control within the UpdatePanel.
C.Add an AsyncPostBackTrigger that references Timer1.
D.Add a PostBackTrigger that references Timer1.
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