“指数型衰减”)
	</div>
</span>
<span id="flashcard_sci_c_front">
	<div id="fc_words" class="fcard_center" style="height:3.4em">
	(<i>有</i> 排好回想时机的)遗忘曲线长什么样...
	</div>
</span>
<span id="flashcard_sci_c_back">
	<div class="fcard_bg" src="pics/fcards0.png" sx=400 sy=240></div>
	<div id="fc_words" style="position: absolute; width: 360px; top: 120px; left: 20px; font-size:20px; line-height: 1.1em;">
	(备注：回想时机的间隔<i>递增</i> )
	</div>
</span>


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