已知=b+i(a，b∈R)，其中i为虚数单位，则a+b=（  ）

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SQL Error: select id,body,options from ***_enewstiku_ where sourceid='24595' and id < 2110993 and id<>'2110993' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='24595' and id > 2110993 and id<>'2110993' order by id asc limit 5