[单选题]
下列选项(63)是单向标记。A.B.<![CDATA[C.<FRAMESET>D.<PORM></p><p>下列选项(63)是单向标记。<p>A．＜FRAME＞</p><p>B．＜NOFRAMES＞</p><p>C．＜FRAMESET＞</p><p>D．＜PORM＞</p></h1>
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<h3><strong>参考答案与解析：</strong></h3>
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