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教材第169页:7.8 设信息源,x={a,b,c,d},且p(a)=1/8、p(b)=5/8,p(c)=1/8,p(d)=1/8,计算各符号的信息量和信息源熵。
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【单选题】按逻辑关系排列下面各段的句子。 A. The monks looked through the books of the monastery, and these revealed that there had been a Father Anselm there a hundred years before. B. The monk went back to the monastery and ...
A.
ECGBFDA
B.
EDGABFC
C.
ECBDFAG
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【单选题】按照中国铁路网规划,到 2020 年,全国铁路营业里程将达到( )。
A.
15 万公里左右
B.
17.5 万公里左右
C.
20 万公里左右
D.
30 万公里左右
【单选题】Knowledge learnt from books doesn’t have the same effect on a child as_____through practice.
A.
those
B.
one
C.
it
D.
that
【单选题】What is the best title for this part? A) Ownership of a book and book owners B) Don’t write in rare and elegant edition C) Show respects to the author by buying a cheap edition D) Read through all the...
A.
B.
C.
D.
D
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A.
The room is dusty and shadowy, filled with books from floor to ceiling.
B.
The sun never enters the room.
C.
The author spent time in this room as a child.
D.
The author did not like the room.
E.
Through the windows in the room, the author saw worlds other than those in which he lived.
【单选题】十二五铁路发展规划中的铁路发展目标规定到 2020 年全国铁路营业里程达到( )千米左右。
A.
11万
B.
10万
C.
12万
D.
13万
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【单选题】—Have you read through the two books he lent you last week? —No , of them is easy to read .
A.
. either          
B.
. none          
C.
. both            
D.
. neither
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