单项选择题 Suppose that at a point in time, Barclays bank was quoting a dollars per pound exchange rate of ￡:$ = 1.4570. Industrial bank was quoting a Japanese yen per dollar exchange rate of $:￥ = 128.17, and Midland bank was quoting a Japanese yen per pound cross rate of ￡:￥ 183. a. Ignoring bid–ask spreads, was there an arbitrage opportunity here? b. If there was an arbitrage opportunity, what steps would you have taken to make an arbitrage profit, and how much would you have profited with $1 million available for this purpose?

单项选择题 滚动轴承外圈的公差带与K、M、N的外壳孔形成的配合性质 。

单项选择题 某社区有汉、回、白、彝、傣等二十多个民族居住。每逢民族节日，各族群众都一起欢庆，“通过民族节，众筹百家宴”。在泼水节大家到民族团结广场相互泼水祈福，在火把节组织篝火晚会一起载歌载舞，在开斋节一起吃馓子、油香……该社区各组群众通过民族节（）①是各民族实现共同繁荣的有效途径②体现了平等团结互助和谐的民族关系③实现了多民族地区社区组织的自我完善④是各民族相互尊重、文化交融的生动写照