假如地球重力加速度减为现在的一半,下列数值不会发生变化的是：

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SQL Error: select id,body,options from ***_enewstiku where sourceid='31922' and id < 2552497 and id<>'2552497' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='31922' and id > 2552497 and id<>'2552497' order by id asc limit 5