【单选题】听力原文: Mike Tyson's heavyweight fight with Clifford Etienne was postponed Monday, the former-champion saying that he had the flu and was not fit to fight. 'I'm sorry to let down all my fans in Memphis ...
【单选题】Tyson Company’s revenues are $300 and investedcapital is $240. Expenses are currently80% of sales. Tyson Company’s currentreturn on investment is: