单项选择题

A.IP板中所含的特殊物质感光后形成潜影,激光激发可再次发光,经光电转换成数字信号
B.IP板中所含的特殊物质感光后,形成潜影,也可经显影,定影后由扫描仪读出
C.IP板中所含的特殊物质为辉尽性荧光物质,一般用氟卤化钡晶体
D.IP板可重复使用,但使用次数有限
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