恢复通风、局扇运行前，必须先检查开关地点附近10米以内瓦斯浓度不得超过（）%，方可恢复正常通风。
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Which three statements are true?（）
A final method in class X can be abstract if and only if X is abstract.
B. A protected method in class X can be overridden by any subclass of
C. A private static method can be called only within other static methods in class
D. A non-static public final method in class X can be overridden in any subclass of
E. A public static method in class X can be called by a subclass of X without explicitly referencing the class
F. A method with the same signature as a private final method in class X can be implemented in a subclass of
G. A protected method in class X can be overridden by a subclass of X only if the subclass is in the same package as
冠字号码查询分类贴标工作中，通过冠字号码查询系统（软件），无法在假币纠纷中一一对应的向客户提供出现钞的冠字号码，但可提供业务发生时段该设备取款现金的冠字号码（文本及图像信息），应张贴（）。
A. 黄标
B. 红标
C. 蓝标
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