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【单选题】
In the "Prisoners' Dilemma" game:A.
prisoners are able to collude with one another.
B.
prisoners are unable to communicate with one another.
C.
the Nash equilibrium results in prisoners serving the smallest combined prison term.
D.
the Nash equilibrium results in one prisoner confessing, while the other does not.
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【单选题】I didn’t manage to do it ____ you had explained how.
A.
unless
B.
until
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【单选题】I didn’t manage to do it _____ you had explained how.
A.
until
B.
unless
C.
when
D.
before
【简答题】I didn’t manage to do
it ____ you explained now.A. until B. unless C. when D. as
【单选题】I didn’t manage to do it_________ you had explained how.
A.
unless
B.
until
C.
when
D.
since