BEIJING (Reuters) - China promised on Monday to respond positively to the United States in high-level economic talks this week but drew a line in the sand by telling Washington that its exchange rate is a matter of national sovereignty.	TOKYO -- Nissan Motor Co. announced plans Monday to launch a next-generation fuel cell vehicle in the early 2010s in Japan and North America as part of its mid-term environmental strategy.	Metro faces a $116 million budget shortfall the next fiscal year, raising the possibility of fare increases, reduced bus and rail service and higher contributions from area taxpayers, according to budget documents and interviews with board members.
B-4, D-2, K-1, M-1, M-8. At times yesterday, the courtroom debate about the law that created a new civil service system for the Defense Department sounded like the judges and lawyers were playing Battleship, the game where opponents use a grid to target and sink ships.	Awoman in a rural South Asian village receives a loan of about $250 to buy a dairy cow. She milks the cow, sells the milk and improves her standard of living while repaying the loan. In much of the world, this is microfinance.	Matt Cardillo's parents were nearing retirement, and he didn't have a clue about their plans. He was only in his early 30s, but with a son on the way and a mortgage to pay, he couldn't help being concerned about their future financial stability.