下列变化属于化学变化的是（ ） A．汽油挥发 B．灯泡发光 C．燃放烟火 D．铜

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 ___19___. Third parties can introduce risk in a variety of ways from connecting with an infected laptop to unauthorized access of network resources to ___20___ 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 ___21___ of service attacks or steal ___22___ information by snooping the network. As they access the corporate network, mobile and remote users inadvertently can infect the network with ___23___ 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.

23（）

A．sickness

B．disease

C．germs

D．viruses

国家卫生部于2003年先后公布了（）三项法规规定用人单位应该向主管部门申报职业病危害项目，根据职业病危害程度对用人单位实行分类管理。

A.《职业性接触毒物危害程度分级》

B.《建设项目职业病危害分类管理办法》

C.《职业病危害项目申报管理办法》

D.《职业病危害因素分类目录》

中国南方电网有限责任公司企业管理制度，《计量自动化终端安装（拆除）管理办法》其中要求：现场安装的终端应检测合格，满足南方电网公司《负荷管理系统通用技术条件》（Q/CSG10016-2007）要求，运输、安装时应采取（）措施。

A.防震

B.防潮

C.防止变形

D.防止被盗

B Egyptian Villages 埃及村落

Most of the inhabitants live in mud-brick homes, their (1)  walls insulating against the afternoon heat. Flat roofs, exposed (2)  the northern evening breezes, serve as cool sleeping (3)  as well as storage areas. Villagers plaster the outer walls (4)  often trim them in blue, a color they believe (5)  off the evil eye. As a man becomes richer, (6)  can add a second story to his house perhaps (7)  his married son. Those villagers who have made the (8)  to Mecca paint the legend of their trip on (9)  outer walls of their homes. Such hajj houses, along (10)  the mosques, are the most distinguished buildings in a (11)

Some villagers build ornate pigeon coops close to their (12) , using the birds as food and their droppings to (13)  crops. Many houses still have dirt floors and lack (14)  or running water; women with jars balanced on their (15)  make the trek to the community well, and children donkeys haul the (16)  liquid in jerry cans.

All (17)  said, government sponsored building programs have also brought newer (18)  residences and utilities to some villages, particularly those outside (19)  Nile Valley in the Oases and the Red Sea (20)  areas.

10.（）