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Most computer systems are (165) to two different groups of attacks: Insider attacks and outsider attacks. A system that is known to be (166) to an outsider attack by preventing (167) from outside can still be vulnerable to the insider attacks accomplished by abusive usage of (168) 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 (169) by tools referred to as Intrusion Detection Systems.

（166）处是（）

A.reliable

B.secure

C.indestructible

D.steady

资产负债表下列各项目中.应根据有关科目余额减去备抵科目余额后的净额填列的有()。

A.存货

B.无形资产

C.应收账款

D.长期股权投资

脊柱结核并发截瘫的临床表现中，正确的是（）

A.先有束带感后有瘫痪

B.最早出现感觉障碍

C.最早出现大便功能障碍

D.最早出现小便功能障碍

E.都是弛缓性瘫痪

患儿4岁，全身严重指陷性水肿，24h尿蛋白定量0．15g／kg，血清蛋白（白蛋白）10g／L，血胆固醇9．2mmol／L，诊断为单纯性肾病。

该患儿不会发生的并发症是（）。

A.低钠血症

B.感染

C.心力衰竭

D.低钾血症

E.静脉血栓形成

试述新闻单位围绕业务推广的公共关系工作。