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问题 单项选择题

通风、空气调节系统，横向和竖向的设置正确的为( )。

A．横向不超过五个开间，竖向按每层设置
B．横向不超过1000m2，竖向按每五层设置
C．横向按每个防火分区，竖向不宜超过五层设置
D．横向按每个防火分区，竖向按每层设置

答案

参考答案：C

解析： 根据《高层民用建筑设计防火规范》(GB 50045—95)(2005年版)第8.5.2条，通风空气调节系统，横向应按每个防火分区设置，竖向不宜超过五层。

填空题

根据下列短文内容，在短文后的空格处填上一个恰当的词，使短文完整、通顺。

     Stamp collecting is a popular    1   . I like collecting stamps. Most of my stamps are   2    France,

Canada, Russia and the USA. I know I can't    3    stamps from every country because there are too

many.

     I don't buy any stamps because they    4    too much money. My father often goes to other counties

for work, so he can    5    foreign stamps home. If I don't like a stamp, I try to change it with others.

     Most of my stamps are used (用过的)    6   . I have to get the stamps off the envelopes (信封). I put

the envelopes into a bowl of water. After a few minutes the water makes the envelopes    7   . Then it's

   8    for me to peel off (剥落) the stamps. After that, I let them dry and put them in my stamp album.

     My stamps make my school subjects interesting. They    9    me what animals, plants, mountains and

rivers there are in a country. It is helpful for my study.   10   some of my stamps will become valuable

someday.
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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 network. 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 has been prohibitive. Fifty-two percent of surveyed CISOs stated that they currently use a moat and castle" 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 (3) of service attacks or steal (4) information by snooping the network. As they access the corporate network, mobile and remote users inadvertently can infect the network with (5) 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.

1（）

A．damageable

B．susceptible

C．vulnerable

D．changeable
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