某校附近有一家小商店,店主经常向未成年学生出售散装卷烟,并容留他们在店内吸烟,有些学生因此经常光顾这家小商店。
(1)该店主的行为违反了哪些法律?
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(2)该店主的行为没有对未成年人履行什么义务?
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(3)上述未成年学生缺乏什么意识?
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