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【简答题】
试证明16-VSB的频谱利用系数为7.1b/(s·Hz)。
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举一反三
【单选题】He is widely ______ as one of the best leaders of the country.
A.
regarded
B.
judged
C.
thought
D.
deemed
【单选题】The reason _____ the president of Czech is widely discussed recently is _______ he was seen “to steal” a pen at a press conference in Chile.
A.
why, because
B.
that, that
C.
why, that
D.
why, why
【简答题】简述线粒体的结构和主要功能。
【单选题】Although he is considered a great writer, _____.
A.
however his works are not widely read
B.
but his works are not widely read
C.
his works are not widely read
D.
still his works are not widely read
【简答题】简述质体和线粒体的结构和功能 ?
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