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【单选题】
从1976年Diffie和Hellman发表的哪一本著作开始,密码学发展进入到新的阶段A.
《复杂自动机组织论》
B.
《密码编码学新方向》
C.
《保密通信的信息理论》
D.
《信息安全国内外的回顾与展望》
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举一反三
【单选题】________ excited Geoff Marcy most was whether there were planets in other solar system where life might exist.
A.
It
B.
That
C.
What
D.
Why
【单选题】Dr. Marcy thinks that life may exist in the 55 Cancri system because ______.
A.
he has found the system similar to the solar system
B.
he has discovered an Earth-like planet there
C.
he has discovered a rocky planet there
D.
he has found signs of life in the system
【简答题】system life cycle
【单选题】________ excited Geoff Marcy most was ________ there were planets in other solar system where life might exist.
A.
It; if
B.
That; whether
C.
What; whether
D.
What; that
【单选题】_______, the worse I seem to feel.
A.
The more medicine I take
B.
When I take more medicine
C.
Taming more of the medicine
D.
More medicine taken
【单选题】The computer doesn't ________ until it is connected to other parts of the system. [ ]
A.
come to life
B.
come to harm
C.
come to light
D.
come to hand
【单选题】There may be, somewhere outside the solar system, intelligent life ______ messages to us.
A.
sends
B.
sent
C.
sending
D.
has sent
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