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问题 单项选择题

下面叙述错误的是( )。

A．基类的protected成员在派生类中仍然是protected的

B．基类的protected成员在public派生类中仍然是protected的

C．基类的protected成员在private派生类中是private的

D．一基类的protected成员不能被派生类的对象访问

答案

参考答案：A

单项选择题

 WebSQL is a SQL-like (1)language for extracting information from the web. Its capabilities for performing navigation of web (2)make it a useful tool for automating several web-related tasks that require the systematic processing of either all the links in a(3),all the pages that can be reached from a given URL through (4)that match a pattern,or a combination of both. WebSQL also provides transparent access to index servers that can be queried via the Common (5)Interface.

空白（4）处应选择（）

A.paths

B.clups

C.tools

D.directories
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单项选择题

碳化塔下部堵塞较常发生在（），结疤以（）为主。

A、水箱段靠近塔底，NaHCO3

B、笠帽盖底部，NaHCO3

C、水箱段靠近塔底，NH4HCO3

D、笠帽盖底部，NH4HCO3
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