题目内容
将探头直接朝向空气发射时
2022-01-25
A.折射多于反射
B.反射多于折射
C.不反射
D.不折射
试卷相关题目
SQL Error: select id,body,options from ***_enewstiku where sourceid='31793' and id < 2541705 and id<>'2541705' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='31793' and id > 2541705 and id<>'2541705' order by id asc limit 5