我国于（ ）成功发射了第一颗人造卫星。

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SQL Error: select id,body,options from ***_enewstiku where sourceid='31813' and id < 2542635 and id<>'2542635' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='31813' and id > 2542635 and id<>'2542635' order by id asc limit 5