如图所示,莱姆病的主要传播媒介是()
A.蜱
B.小鼠
C.牛
D.蚊
E.狼
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《刑法》第()条规定,编造、传播影响证券交易的虚假信息,或伪造、变造、销毁交易记录,扰乱证券交易市场,情节严重的,将处以罚款并追究刑事责任。
A.183
B.182
C.181
D.180
舒适卧位的基本要求为?
我国发射的“神州”五号载人宇宙飞船的周期约为90min,如果把它绕地球的运动看作是匀速圆周运动,则飞船的运动和人造地球同步卫星(轨道平面与地球赤道平面共面,运行周期与地球自转周期相同)的运动相比,下列判断中正确的是 ( )
A.飞船的轨道半径大于同步卫星的轨道半径
B.飞船运行的向心加速大于同步卫星运行的向心加速度
C.飞船的运行速度小于同步卫星的运行速度
D.飞船运行的角速度小于同步卫星运行的角速度
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.
(70)处填()。
A.framework
B.problem
C.basis
D.foundation
天候の( )、体の調子がよくない。
A.せいか
B.ためで
C.わけで
D.原因か