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题库 / GMATAdvanced-SC-6
Indoor air pollution can threaten the health of closely confined farm animals and the workers who tend them and perhaps as well impairs the quality of such farm products like eggs, poultry, and pork.
perhaps as well impairs the quality of such farm products like
perhaps as well impairs the quality of such farm products as
perhaps also impairs the quality of such farm products like
may also impair the quality of such farm products like
may also impair the quality of such farm products as
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ACD such like，错误
B：平行角度来说air pollution can threathen...,but also (can) impatr,两个并列的句子应该都是用表示可能的句意。
as well应该放句尾，错误
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