Last week, the Trump administration said it is loosening restrictions on air toxins from mercury, lead and other heavy metals that are released by coal plants. Such pollution is known to be neurotoxic and has been linked to irreversible brain damage in children and infants, as well as heart disease and cancer in adults.
testSort(shellSort, "Shell", arr, N);
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（一）拒不执行人民政府在紧急状态情况下依法发布的决定、命令的；
No base class to extend, no abstract methods to implement, no controller to coordinate with — just an object with the right shape.