根据还原蒸馏法炼锌或湿法炼锌对焙砂的要求不同，沸腾焙烧分别采用（）和（）两种不同的操作。 正确。 错误。
在载流量不变，损耗不增加的前提下，用铝芯电缆替换铜芯电缆，则截面应为铜芯的（）倍。 正确。 错误。
You use Microsoft .NET Framework 4 to create a Windows Forms application. You plan to use a Windows Presentation Foundation (WPF) control of the UserControl1 type hosted in an ElementHost control named elementHost1. You write the following code segment. (Line numbers are included for reference only.) You need to ensure that the application changes the background color of the hosted control when the background color of the form changes. Which code segment should you insert at line 05?（） 正确。 错误。
You are the desktop administrator for your company. All employees in the graphics department use identical dual-processor Windows XP Professional computers. The employees in the graphics department use only 32-bit Windows applications. Veronica is a user in the graphics department. Veronica reports poor system performance when she runs a certain custom application. The application was designed for multiprocessor use with Windows 2000. Veronica reports that the performance problems have only recently begun. You run Task Manager on Veronica's computer. You view the performance statistics shown in the exhibit. You need to improve application performance on Veronica's computer. What should you do?（） 正确。 错误。
煤气比重是煤气重度与同状态下列哪种气体重度的比值（）。 正确。 错误。
由于优先股股利是税后支付的，因此，相对于债务融资而言，优先股融资并不具有财务杠杆效应。
