金本位制下，各国汇率决定的标准是（ ）。

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SQL Error: select id,body,options from ***_enewstiku where sourceid='25452' and id < 2143521 and id<>'2143521' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='25452' and id > 2143521 and id<>'2143521' order by id asc limit 5