单项选择题

The research findings______.

A．have severely influenced the company's reputation
B．have made the company suffer a loss of profits
C．have done nothing serious to the company
D．have led the company to improve its products
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单项选择题
According to the passage, DuPont______.
A．renamed tacit as to whether exposure to PFOA could be dangerous to the public
B．refused to admit that exposure to PFOA could be a health hazard
C．asked for more evidence to prove that exposure to PFOA could be a threat to people's health
D．condemned the charge that exposure to PFOA could risk people's health
单项选择题
The employee health study on PFOA conducted by DuPont revealed______.
A．a certain degree of relation between exposure to PFOA and health
B．possible damage done by PFOA exposure to health
C．close ties between exposure to PFOA and health
D．most of the health parameters are unaffected by PFOA exposure
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