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ZXDSL 831C最多支持（）条PVC。
A . 5
B . 6
C . 7
D . 8
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当医疗资源的微观分配发生矛盾时，应优先把有限的卫生资源分配给（）
下列说法正确的是（）
A520拥有强大的PC性能，以下对他性能描述正确的是？（）
评价中心起源于（）
下列各项中，属于会计等式的有（）。