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                <img src="http://n.sinaimg.cn/news/transform/200/w600h400/20190210/S9wX-hsqyiwu8675385.jpg" alt="AAAAA级是AABB还是AAAAAAAA级级？规范写法学习课件与范例" width="640" height="405" fetchpriority="high" decoding="async">
              </p>
              <p>“AAAAA级”由五个大写字母A和一个“级”字组成，按字母数量读作“五A”或“5A级”。它不是AABB式的叠词，也不是“AAAAAAAA级级”。后两种写法的字母数量和结构都不同，不能与“AAAAA级”当作同一种表示。</p>

<h2>先看字母和“级”的数量</h2>
<p>判断这类写法，最简单的方法是把连续的A逐个数一遍，再看末尾有几个“级”。“A”有几个，通常就按几A来读；“级”是表示等级的词，不需要重复。于是，四个A写作“AAAA级”或“4A级”，五个A写作“AAAAA级”或“5A级”。</p>
<table>
<thead><tr><th>写法</th><th>A的数量</th><th>对应读法</th><th>说明</th></tr></thead>
<tbody>
<tr><td>AA级</td><td>2个</td><td>2A级、二A</td><td>两个A，末尾一个“级”</td></tr>
<tr><td>AAA级</td><td>3个</td><td>3A级、三A</td><td>三个A，末尾一个“级”</td></tr>
<tr><td>AAAA级</td><td>4个</td><td>4A级、四A</td><td>四个A，末尾一个“级”</td></tr>
<tr><td>AAAAA级</td><td>5个</td><td>5A级、五A</td><td>五个A，末尾一个“级”</td></tr>
<tr><td>AAAAAAAA级</td><td>8个</td><td>8A级、八A</td><td>八个A，末尾一个“级”</td></tr>
</tbody>
</table>

<h2>AAAAA级为什么不是AABB</h2>
<p>AABB说的是一种由两个相同音节或字形组合而成的结构，常见例子有“整整齐齐”“明明白白”。“AAAAA级”则是连续书写五个相同的英文字母A，再接一个表示等级的“级”。它是字母加等级词的写法，不是汉语里的AABB式词语。</p>
<p>两者看起来都有重复元素，但重复的对象和作用不同：AABB描述词语构成；“AAAAA级”里的A用于标记等级档次。不能因为字母重复，就把它归为AABB，也不应把五个A改写成两个A、两个B。</p>

<h2>“AAAAAAAA级级”错在哪里</h2>
<p>如果按字面数，“AAAAAAAA级级”包含八个A，后面还重复写了两个“级”。它既不等于五个A的“AAAAA级”，也不是常见的规范等级写法。若要表达八个A，应写成“AAAAAAAA级”或在适用的标注规则允许时写作“8A级”；“级”保留一个即可。</p>
<p>这里需要区分“字母数量”和“等级词数量”。把“级”多写一次，不会让等级更高；把A的数量增加，也会改变所表示的档次。比如“AAAAA级”与“AAAAAAAA级”前者是五个A，后者是八个A，不能互换。</p>

<h2>数字写法与字母写法怎么选</h2>
<p>在同一段文字中，最好采用一种清楚、统一的表达方式。说明字母标记时可以写“AAAAA级”；希望读者一眼看出数量时，也可以写“5A级”。两种写法表达的是五个A所对应的等级称呼。相同道理，“AAAA级”对应四个A，常可写作“4A级”。不要在一个词里把字母和数字混搭成含义不清的形式，例如把五个A和一个额外数字拼在一起。</p>
<p>若这是某个具体评定制度中的正式称号，还要以该制度采用的名称为准；但就字面结构而言，五个A写作“AAAAA级”，末尾只接一个“级”。单凭字母写法可以数出A的个数，至于具体制度赋予该档次的标准或资格，则不是增加字母、重复“级”就能改变的。</p>

<h2>规范写法结论</h2>
<p>核心区别可以概括为：<strong>AAAAA级＝五个A＋一个“级”</strong>，通常读作“5A级”；AABB是另一种词语结构；“AAAAAAAA级级”按字面是八个A加两个“级”，并非“AAAAA级”的写法。书写时数清A的个数，并让“级”只出现一次，就不容易混淆。</p>
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