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居民会议有哪几种形式？

答案

参考答案：

居民会议由十八周岁以上的居民组成。居民会议可以由全体十八周岁以上的居民或者每户派代表参加，也可以由每个居民小组选举代表二至三人参加。

单项选择题

以数量分级表示个体反应的效应强度称为（）.

A．LD50

B．治疗指数

C．量反应

D．受体

E．竞争性拮抗药
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单项选择题

To compete in today’s fast-paced competitive environment, organizations are increasingly allowing contractors, partners, visitors and guests to access their internal enterprise networks. These users may connect to the network through wired ports in conference rooms or offices, or via wireless access points. In allowing this open access for third parties, LANs become （1）. Third parties can introduce risk in a variety of ways from connecting with an infected laptop to unauthorized access of network resources to（2）activity. For many organizations, however, the operational complexity and costs to ensure safe third party network access have been prohibitive. Fifty-two percent of surveyed CISOs state that they currently use a moat and castle’s security approach, and admit that defenses inside the perimeter are weak. Threats from internal users are also increasingly a cause for security concerns. Employees with malicious intent can launch（4）of service attacks or steal （5） information by snooping the network. As they access the corporate network, mobile and remote users inadvertently can infect the network with （6）and worms acquired from unprotected public networks. Hackers masquerading as internal users can take advantage of weak internal security to gain access to confidential information.

4（）

A．reserved

B．confidential

C．complete

D．mysterious
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