单项选择题A．It is easier to clean and repair.B．It is non-fixed and flexible.C．All its units are of the same height.D．Its chopping board is nearer to the sink.

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单项选择题A．the Doha round can’ t be finished by 2006B．strong political will is necessaryC．nations can continue the negotiation even if there were no consensus among themD．December’ s conference to be held in Doha next year is important

单项选择题A．Employer and employee.B．Salesman and customer.C．Advertiser and customer.D．Colleagues.

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