局部室壁呈反向运动是哪种疾病的特征性影像（）。 A.预激综合征 B.X综合征 C.早

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 ___72___. Third parties can introduce risk in a variety of ways from connecting with an infected laptop to unauthorized access of network resources to ___73___ 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 ___74___ of service attacks or steal ___75___ information by snooping the network. As they access the corporate network, mobile and remote users inadvertently can infect the network with ___76___ 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.

73（）

A.malicious 

B.venomous 

C.felonious 

D.villainous

下列关于哮喘病人的护理措施，正确的有()。

A．为减少耗氧，让病人绝对卧床

B．室内布置力求简单，杜绝已知过敏原

C．多饮水

D．密切观察病人呼吸音、呼吸困难的程度、血气分析结果

E．限制水的入量

全世界第一个采用分组交换技术的计算机网络是( )。

A．ARPANET

B．NSFNET

C．CSNET

D．BITNET

简述原材料库存对周期变化的反应比加工品和制成品明显的原因。

天然气提氦