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【简答题】
由于矩形波导的四壁都是导体,根据边界条件波导中不可能传输 TEM 模,只能传输 或 模。
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举一反三
【简答题】He has known both grief and happiness.
【单选题】It is obvious _________ he has known the news and he is very satisfied with the result.
A.
which
B.
that
C.
what
D.
whether
【单选题】---- ____________ he has known the good news. ---- ______ is no wonder he is so excited.
A.
It is likely that; It
B.
It is probably that; There
C.
He is likely that; There
D.
He is possible that ; It
【简答题】简要叙述如何进行脱硫。
【简答题】韩国的饮茶与中国古代饮茶颇为相似,以( )为基本精神。A. 和、静B.清、寂C.简、真 D.雅、礼 B. :A C. 、韩国的饮茶与中国古代饮茶颇为相似,以“和”“静”为基本精神,其含义泛指（ ）A.和敬俭真 D. 和敬雅真 E. 和敬清寂D.清和寂雅
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