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【单选题】
一个密码系统，通常简称为密码体制。可由五元组(M，C，K，E，D)构成密码体制模型，以下有关叙述中，______是不正确的。A.
M代表明文空间；C代表空间；K代表密钥空间；E代表加密算法；D代表解密算法
B.
密钥空间是全体密钥的集合，每一个密钥K均由加密密钥Ke和解密密钥Kd组成，即有K=
C.
加密算法是一簇由M到C的加密变换，即有C=(M，Kd)
D.
解密算法是一簇由C到M的加密变换，即有M=(C，Kd)
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举一反三
【单选题】There are some more topics to discuss, ______ the problem of pollution.
A.
A)generally
B.
)especially
C.
C) exactly
D.
D)probably
【简答题】下列不属于固体废弃物特点的是()。
【简答题】What are some of the typical lyrical subjects of rock songs?
【单选题】The president __________the speech by some additions and deletions.
A.
amended
B.
patched
C.
rectified
D.
restored
【多选题】请指出下面句子结构为主+谓(不及物动词)(SV)的句子。
A.
All the folks in the theatre were deeply moved.
B.
The existence of both racial and ual discrimination in employment is well documented.
C.
Certain forms of politeness should be observed as well.
D.
All parents have to solve the problems of and discipline.
【单选题】The president ______ the speech by some additions and deletions.
A.
A amended
B.
patched
C.
c. rectified
D.
D, restored
【单选题】We _____some brochures ______ to illustrate the products we
A.
nufactured．
B.
enclose, to you
C.
enclose you,\
D.
enclose,\
E.
enclose, you
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