稳定型心绞痛的主要临床表现为（ ）。

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SQL Error: select id,body,options from ***_enewstiku where sourceid='30909' and id < 2487320 and id<>'2487320' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='30909' and id > 2487320 and id<>'2487320' order by id asc limit 5