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- 单项选择题 You create a Microsoft ASP.NET application by using the Microsoft .NET Framework version 3.5. You create a Web form in the application by using the following code fragment. （Line numbers are included for reference only.）
| English | Chinese | Japan | Korean | - 69 - Test Information Co.， Ltd. All rights reserved. You plan to create a client-side script code by using ASP.NET AJAX. You need to ensure that while a request is being processed， any subsequent Click events on the btnSubmit Button control are suppressed. Which code fragment should you insert at line 10？ （）
A、A
B、B
C、C
D、D
- C
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