单项选择题
A．我的主页< TITLE >B．<HEAD>的主页< HEAD >C．< BODY>我的主页<……</h1>
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下图是HTML 文件test.html 在IE 中的显示效果，实现图中①处效果的HTML 语句是（68），实现图中② 处效果的HTML 语句是（69），实现图中③ 处效果的HTML 语句是（70）<br />
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（68）处填（）。 <br />
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A．<TITLE>我的主页</TITLE ><br />
B．<HEAD>的主页</ HEAD ><br />
C．< BODY>我的主页</ BODY ><br />
D．<H1>我的主页</ H1></p>
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<span>热门</span><span>试题</span>
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<a title="（56）处填（）。" href="https://m.zhaokaoti.com/view/sjtk/39363386A92CEFE7.html">
<p class="content"><span>单项选择题</span>（56）处填（）。</p>
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A．INSERT<br />
B．DELETE<br />
C．UPDATE<br />
D．MODIFY</p>
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<p class="content"><span>单项选择题</span>（55）处填（）。</p>
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A．非空主键<br />
B．主键<br />
C．外键<br />
D．候选键</p>
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<p class="content"><span>单项选择题</span>（65）处填（）。</p>
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A．45，12，30，25，67，52，85<br />
B．85，67，52，45，30，25，12<br />
C．12，25，30，45，52，67，85<br />
D．45，12，25，30，85，67，52</p>
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<p class="content"><span>单项选择题</span>（58）处填（）。</p>
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A．由其后序遍历序列和中序遍历序列可以构造该二叉树的先序遍历序列<br />
B．由其先序遍历序列和后序遍历序列可以构造该二叉树的中序遍历序列<br />
C．由其层序遍历序列和中序遍历序列可以构造该二叉树的先序遍历序列<br />
D．由其层序遍历序列和中序遍历序列不能构造该二叉树的后序遍历序列</p>
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<p class="content"><span>单项选择题</span>（52）处填（）。</p>
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A．S中应加入关系模式 D的主键<br />
B．S中应加入关系模式 C的主键<br />
C．D中应加入关系模式 S的主键<br />
D．C中应加入关系模式 S的主键</p>
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