【单选题】Summit Products, Inc. is interested in producing and sellingan improved widget. Market research indicates that customers would be willingto pay $90 for such a widget and that 50,000 units could be sol...
【简答题】阅读理解。 The Summit 2009 World leaders from about 20 countries met at the London Summit (峰会) 2009 on September 2nd, Thursday and reached an agreement of $1,100,000 million to fight against the worst econ...