用简便方法计算．73+3.4+27+5.67.25-3.42-1.5899×32

因淀粉浆的浆膜性能柔软而又坚韧，故应用最广泛。

建设工程施工总承包单位依法将建设工程分包给其他单位的，关于安全生产责任的说法，正确的是（）。

A.分包合同中应当明确总、分包单位各自的安全生产方面的权力和义务

B.分包单位的安全生产责任由分包单位独立承担

C.总承包单位对分包单位的安全生产承担安全责任

D.总承包单位和分包单位对施工现场安全生产承担同等责任

霍乱病人对症治疗重点应注意（）。

A.有效血容量的补充

B.镇静

C.解痉止痛

D.降温

E.止泻

锁骨上下区有形状不规则的纤维空洞，周围有比较广泛的条索状纤维性改变，并有新老不一的病灶，肺门上提，中下野肺纹理呈垂柳状，常见胸膜增厚，诊断为（）

A.浸润型肺结核

B.结核球

C.干酪性肺炎

D.慢性纤维空洞型肺结核

E.干性胸膜炎

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.

（68）处填（）。

A．direct

B．navigate

C．indicate

D．show