请写出一个大于1 且小于2 的无理数（ ）

肺动脉高压较少发生于（）

A.风湿性心脏病，主动脉瓣狭窄伴关闭不全

B.风湿性心脏病，二尖瓣狭窄伴关闭不全

C.风湿性心脏病，二尖瓣重度狭窄

D.风湿性心脏病，肺动脉瓣狭窄

E.风湿性心脏病，主动脉瓣狭窄伴关闭不全

运输时信号不灵敏会造成哪些伤害？（）

A、绞车误运行造成伤人事故

B、绞车电机频繁启动烧损

C、断绳跑车事故

进行多方案经济效果评价时，下列做法中正确的有（）

A.评价现金流量相关型方案时，将现金流量间具有正影响的方案视为独立方案

B.比选有资金限制的独立方案时，用独立方案互斥法能保证获得最佳组合方案

C.评价经济上互补面而又对称的互补型方案时，可将其结合为一个综合体来考虑

D.评价经济上互补又不对称的互补型方案时，可分别组成独立方案来考虑

E.评价现金流量相关型方案时，将现金量间具有负影响的方案视为互斥方案

椎体骨与椎间盘破坏并存时，最先考虑哪种疾病（）

A.脊柱转移瘤

B.压缩性骨折

C.脊椎结核

D.脊椎血管瘤

E.椎体骨质疏松

Most computer systems are (66) to two different groups of attacks: Insider attacks and outsider attacks. A system that is known to be (67) to an outsider attack by preventing (68) from outside can still be vulnerable to the insider attacks accomplished by abusive usage of (69) users. Detecting such abusive usage as well as attacks by outsides not only provides information on damage assessment, but also helps to prevent future attacks. These attacks are usually (70) by tools referred to as Intrusion Detection Systems.

（69）处填（）。

A．power

B．rights

C．authorized

D．common