HTML 中標(biāo)記用于定義表格的 （ ） 。
A、行
B、列
C、單元格
D、標(biāo)題
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一個(gè) B 類網(wǎng)絡(luò)的子網(wǎng)掩碼為 255.255.224.0，則這個(gè)網(wǎng)絡(luò)被劃分成了（ ）個(gè)子網(wǎng)。
A、2
B、4
C、6
D、8
在 Windows 系統(tǒng)中設(shè)置默認(rèn)路由的作用是 （ ） 。
A、當(dāng)主機(jī)接收到一個(gè)訪問請求時(shí)首先選擇的路由
B、當(dāng)沒有其它路由可選時(shí)最后選擇的路由
C、訪問本地主機(jī)的路由
D、必須選擇的路由
HTML<body>元素中，（ ）屬性用于定義超鏈接被鼠標(biāo)點(diǎn)擊后所顯示的顏色。
A、alink
B、background
C、bgcolor
D、vlink
以下不符合 XML 文檔語法規(guī)范的是 （ ） 。
A、文檔的第一行必須是 XML 文檔聲明
B、文檔必須包含根元素
C、每個(gè)開始標(biāo)記必須和結(jié)束標(biāo)記配對使用
D、標(biāo)記之間可以交叉嵌套
For nearly ten years, the Unified Modeling Language (UML) has been the industrystandard for visualizing, specifying, constructing, and documenting the（1） of a software-intensive system. As the （2）standard modeling language, the UML facilitates communication and reduces confusion among project （3） The recent standardization of UML 2.0 has further extended the language's scope and viability. Its inherent expressiveness allows users to （4） everything from enterprise information systems and distributed Web-based applications to real-time embedded systems. The UML is not limited to modeling software. In fact, it is expressive enough to model （5） systems, such as workflow in the legal system, the structure and behavior of a patien healthcare system, software engineering in aircraft combat systems, and the design of hardware. To understand the UML, you need to form a conceptual model of the language, and this requires learning three major elements: the UML's basic building blocks, the rules that dictate how those building blocks may be put together, and some common mechanisms that apply throughout the UML.
（1）A、classes
B、components
C、sequences
D、artifacts
（2）A、real
B、legal
C、de facto
D、illegal
（3）A、investors
B、developers
C、designers
D、stakeholders
（4）A、model
B、code
C、test
D、modify
（5）A、non-hardware
B、non-software
C、hardware
D、software
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