原核复制起始，还未进人延长时，哪组物质已经出现（    ）

试卷相关题目

SQL Error: select id,body,options from ***_enewstiku where sourceid='27518' and id < 2271313 and id<>'2271313' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='27518' and id > 2271313 and id<>'2271313' order by id asc limit 5