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【单选题】
当空间的平面垂直于投影面时,则投影面上的投影 。A.
反映
B.
积聚成一条直线
C.
为放大的类似形
D.
为缩小的类似形
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皮皮学刷刷变学霸
举一反三
【单选题】He is an honest and reliable man; he never ______ himself by cheating and telling lies.
A.
degenerates
B.
degrades
C.
dissatisfies
D.
disregards
【简答题】A．synchronous B．Asynchronous C．symmetric D．asymmetric
【多选题】Asymmetric and symmetric ciphers differ in which of the following way（s）？ （）
A.
Asymmetric ciphers use pre-shared keys
B.
Symmetric ciphers are faster to compute
C.
Asymmetric ciphers are faster to compute
D.
Asymmetric ciphers use public and private
【多选题】Which three are distinctions between asymmetric and symmetric algorithms？ （）
A.
Only symmetric algorithms have a key exchange technology built in
B.
Asymmetric algorithms are used quite often as key exchange protocols for symmetricalgorithms
C.
Only asymmetric algorithms have a key exchange technology built in
D.
Asymmetric algorithms are based on more complex mathematical computations
【简答题】不对称转录(asymmetric trancription)
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