题目内容
毫米波的频率范围是( )。
2021-10-14
A.3〜30kHz
B.3〜30MHz
C.3〜300MHz
D.3〜30GHz
E.3〜300GHz
试卷相关题目
SQL Error: select id,body,options from ***_enewstiku where sourceid='25688' and id < 2159253 and id<>'2159253' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='25688' and id > 2159253 and id<>'2159253' order by id asc limit 5