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【单选题】
对模拟信号来说，满足什么条件接受端可不失真的取出原模拟信号（）。A.
fs＞２fm;
B.
fm＞fs;
C.
fs＜２fm;
D.
fm＜fs;
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【简答题】在公式 S= 1 2 (a+b)h 中，已知b=3，h=5，S=20，则a=______．
【单选题】— Zhang Lili, “the most beautiful teacher”, has moved us deeply. — Yes, and she is ______ popular with her students.
A.
sometimes
B.
never
C.
always
D.
hardly
【简答题】M24-5H6H-S的M24表示______代号，5H表示______代号，6H表示______代号，S表示______。
【单选题】听力原文：This is William Marshall with this hour's top story. The City of Plasburg today has announced plans to create a brand new sports complex in downtown Plasburg. According to Mayor Jackson Tuttle, t...
A.
A brand new sports car will be launched.
B.
A new mayor will be elected.
C.
A sports complex will be created.
D.
The Plainsview Bridge is being repaired.
【单选题】As ___ matter of fact, it was her attitude towards ____life that moved us most.
A.
a; the
B.
a; /
C.
/ ; /
D.
the; /
【单选题】In 2013, _____________ ranked him the most successful male solo artist on the Billboard Hot 100 Top All-Time Artists, making him third overall behind ______________ and Madonna.
A.
Billboard; the Beatles
B.
UK Charts; Eagles
C.
iTune; the Beatles
D.
Grammy; Eagles
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