题目内容

列车推进运行的()要求按《行车组织规则》的规定执行。

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浙江省于()年提出实施“千万亩十亿方节水工程”。

A. 2003
B. 2004
C. 2005

You are creating a Windows Forms application by using the .NET Framework 3.5.You plan to develop a custom control for the application. The control will be a composite control.Your need to derive from the class that will create the control by using the minimum amount of development effort.What should you do?()

A. Derive from the Control class.
B. Derive from the UserControl class.
C. Derive from the FrameworkElement class.
Derive from the ContainerControl class.

坚硬的烟煤普氏系数为()。

A. f=0.5
B. f=1.0
C. f=2
D. f=3

特种设备事故处理应认真执行“()”不放过的原则。

A. 三
B. 四
C. 五

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