题目内容

当发动机处于同一转速时，随着飞行高度提高，压气机的增压比值会（）

A. 增加
B. 减小
C. 不变
D. 忽增忽减

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You work as an ASP.NET Web Application Developer for SomeCompany. The company uses Visual Studio .NET 2010 as its application development platform.You create an ASP.NET Web site using .NET Framework 4.0. Only registered users of the company will be able to use the application. The application holds a page named UserAccount.aspx that enables new users to register them to the registered users„ list of the company. The UserAccount page hold numerous TextBox controls that accept users personal details， such as user name， password， home address， zipcode， phone number， etc. One of the TextBox controls on the page is named ZipCode in which a user enters a zip code. You must ensure that when a user submits the UserAccount page， ZipCode must contain ﬁve numeric digits. What will you do to accomplish this？（）

A. Use RangeValidator.
B. Use RegularExpressionValidator
C. Use RequiredValidator
D. Use CompareValidator
E. Use RequiredFieldValidator

房屋墙体冬季砌筑施工宜采用掺盐砂浆，以便于抗冻。

A. 正确
B. 错误

试写出三种标准节流装置，并写出它们的取压方式？

配有重合闸后加速的线路，当重合到永久性故障时（）

A. 能瞬时切除故障
B. 不能瞬时切除故障
C. 具体情况具体分析，故障点在Ⅰ段保护范围内时，可以瞬时切除故障
D. 故障点在Ⅱ段保护范围内时，则需带延时切除。