請閱讀下列資料后,回答人民幣升值與外匯儲備關(guān)系相關(guān)的問題。
	(1)簡單說明3個常見的匯率決定理論。
	(2)請簡單說明凱恩斯匯率均衡理論的含義。
	(3)根據(jù)上表資料,簡單說明一下目前人民幣升值與外匯儲備的關(guān)系。
	
	P銀行:What’s your spot USD against SGD 5 mio?
	M銀行:50/70.
	P銀行:At 2.0450,we buy SGD and sell USD 5 mio.
	M銀行:Ok,done.We sell SGD and buy USD 5 mio at 2.0450,value July 10,2009.Our USD to…(account)where is yourS GD?
	P銀行:Our SGD to…(account).Thanks for the deal MHTK.
	M銀行:Thanks a lot,PCSI.
	P銀行:What’s your spot USD against SGD 5 mio?
	M銀行:50/70.
	P銀行:At 2.0450,we buy SGD and sell USD 5 mio.
	M銀行:Ok,done.We sell SGD and buy USD 5 mio at 2.0450,value July 10,2009.Our USD to…(account)where is yourS GD?
	P銀行:Our SGD to…(account).Thanks for the deal MHTK.
	M銀行:Thanks a lot,PCSI.