病历摘要：患者男性，59岁，因非劳力性心前区钝痛30分钟小时，向左臂放射，急诊入院。患者近2年中类似症状间断发作，发作时伴大汗，持续20分钟左右，舌下含服硝酸甘油可缓解。体检：BP110/60mmHgHR80次/分，律齐，余未见异常。

下列哪些不稳定型心绞痛与稳定型心绞痛不同？（）提示：心电图示发作时：偶发室性期前收缩，V1～3ST段抬高，T波倒置；发作后：V1～3ST-T恢复正常，室早消失。已确诊为不稳定型心绞痛。

A.胸痛的部位

B.胸痛的性质

C.发作时出汗，面色苍白

D.休息状态下发作即可发作

E.发作时心电图有ST段抬高

F.含服硝酸甘油可缓解

G.发作时可表现为牙痛上腹痛等

H.治疗时应用抗凝药

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（71）. Third parties can introduce risk in a variety of ways from connecting with an infected laptop to unauthorized access of network resources to （72） 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（73）of service attacks or steal （74）information by snooping the network. As they access the corporate network, mobile and remote users inadvertently can infect the network with （75） 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.

A．sickness

B．disease

C．viruses

D．germs