下列物品利用凸透镜透光原理的是（ ）。

试卷相关题目

SQL Error: select id,body,options from ***_enewstiku where sourceid='29890' and id < 2424840 and id<>'2424840' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='29890' and id > 2424840 and id<>'2424840' order by id asc limit 5