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计划:安装安全杆 目标:减少儿童玩打火机所引起的火灾 证明计划无法让目标达成
A安全杠杆的增加使打火机比实行这项规定之前更昂贵,与安全无关。
B相对于普通打火机来说,成年人更有可能将防儿童打火机遗留在儿童能接触到的地方,该原因与题目已知原因结合,导致目标无法达成。
C许多由幼儿引发的火灾是由他们的父母迅速发现和扑灭的,与计划目标无关。
D不像防儿童打火机那样,连年仅两岁的孩子都可以操作不防儿童的打火机,无法解释为啥计划不能让目标达成。
E每年大约有5,000起火灾是因为在安装安全杆之前,孩子们玩打火机导致的。
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