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什么是电压表？测量电压时电压表与被测电路采用什么接线方式？

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气举阀按工作原理可分为注入压力操作阀、（）、导流阀、盲阀。

A. 固定式阀
B. 生产压力操作阀
C. 平衡阀
D. 波纹管阀

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对发电厂的高温高压管道进行焊接后热处理时，应选用何种工艺？

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斗轮机的斗轮每回转一次，单位回转角度内取料量是相等的。（）

A. 正确
B. 错误

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You use the following declaration to add a Web user control named TestUserControl.ascx to an ASP.NET page named TestPage.aspx. You add the following code to the code-behind file of TestPage.aspx. private void TestMethod（）{ ...}You define the following delegate. public delegate void MyEventHandler（）； You need to add an event of type MyEventHandler named MyEvent to TestUserControl.ascx and attach the page’s TestMethod method to the event. Which two actions should you perform？（）

Add the following line of code to TestUserControl.ascx.cs. public event MyEventHandler MyEvent；
B. Add the following line of code to TestUserControl.ascx.cs. public MyEventHandler MyEvent；
C. Replace the TestUserControl.ascx reference in TestPage.aspx with the following declaration.
D. Replace the TestUserControl.ascx reference in TestPage.aspx with the following declaration.

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