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问题 单项选择题

茵陈抗菌作用的有效成分是（）

A．茯苓素

B．6，7-二甲氧基香豆素

C．天门冬酰胺

D．茵陈炔酮

E．β-茯苓聚糖

答案

参考答案：D

解析：

茵陈抗菌活性成分主要是茵陈炔酮、对羟基苯乙酮和其他挥发油成分。

单项选择题

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
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选择题

按劳分配与生产资料社会主义公有制之间的关系是 [ ]

①按劳分配是社会主义公有制经济中个人消费品分配的基本原则 ②后者为前者提供了可能性 ③前者是后者在分配关系上的体现 ④前者是后者的前提

A．①②③

B．①②④

C．①③④

D．②③④

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