Some scientists have been critical of the laboratory tests conducted by the Federal Drug Administration on the grounds that the amounts of suspected carcinogens fed to animals far exceeds those that humans could consume
far exceeds those that humans could consume
exceeds by far those humans can consume
far exceeds those humans are able to consume
exceed by far those able to be consumed by humans
far exceed those that humans could consume
by far是“至今”的意思,而本选项想说的是“远远的超过”,所以此处by far措辞有误。
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