主要标记细胞的某种特异性成分，用于肿瘤鉴别诊断的检查方法是（）。
A. 直接免疫荧光法
B. 间接免疫荧光法
C. 免疫酶标法
D. 斑贴试验
E. 皮内试验
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You create a Web Form. The Web Form allows users to calculate values and display the results in a label named lblResults. You need to capture all unhandled exceptions on the Web Form through the Error event. The Error event must capture each unhandled exception and display it on the Web Form. Which code segment should you use? （）
A. Protected Sub Page_Error(ByVal sender As Object, _ ByVal e As System.EventArgs) Handles Me.Error lblResults.Text = e.ToString() e = NothingEnd Sub
B. Protected Sub Page_Error(ByVal sender As Object, _ ByVal e As System.EventArgs) Handles Me.Error lblResults.Text = Server.GetLastError().ToString() Server.ClearError()End Sub
C. Protected Sub Page_Error(ByVal sender As Object, _ ByVal e As System.EventArgs) Handles Me.Error Response.Write(e.ToString()) e = NothingEnd Sub
D. Protected Sub Page_Error(ByVal sender As Object, _ ByVal e As System.EventArgs) Handles Me.Error Response.Write(Server.GetLastError().ToString()) Server.ClearError()End Su
一般来说，对应于高能级的能带较宽，而禁带较窄，是否如此，为什么？
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