皮皮学，免费搜题
登录
搜题
【单选题】
The notion of NP-completeness has provided a(66)mathematical definition for(67)intractability of NP problems. But this measure applies only to worst-case complexity. Being NP-complete does not(68)that a problem is intractable on the average case. Indeed, some NP-complete problems are '(69)on average', though some may not be. Levin initiated the study of average-case intractability, He showed that a bounded tiling problem under a simple distribution is average-case NP-complete. Since then, several additional average-case NP-complete problems have been shown within Levin's(70). This paper is intended to provide a comprehensive survey of average-case NP-complete problems that have been published so far, and the techniques of obtaining these results.A.
relaxed
B.
rough
C.
rigorous
D.
feasible
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【简答题】案例:北京的全聚德是老字号,前几年北京出现了4家“仝聚德”,后被取缔。分析新开的“仝聚德”的出发点,以及取缔其的原因。
【单选题】What characterizes the business school student population of today?______.
A.
Greater diversity
B.
Intellectual maturity
C.
Exceptional diligence
D.
Higher ambition
【单选题】Taleeb was surprised about something people said about him. What did they say?
A.
They said he was a good student when in fact he doesn’t study enough
B.
They said he had a lot of friends when he thought he didn’t have enough friends
C.
They said he was should become a psychologist even though he is not very interested in people
D.
They said he would not be successful unless he stopped going to parties
E.
They said he worries too much and doesn’t share his feelings with others.
相关题目：