费雪认为，短期内货币流通的速度和产出保持不变，所以，货币存量的变化（ ）水平的变化。

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SQL Error: select id,body,options from ***_enewstiku where sourceid='25450' and id < 2143453 and id<>'2143453' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='25450' and id > 2143453 and id<>'2143453' order by id asc limit 5