有关细胞凋亡正确的描述是

[单选题]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(6) .Third parties can introduce risk in a variety of ways from connecting with an infected laptop to unauthorized access of network resources to(7)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 (8) of service attacks or steal (9) information by snooping the network. As they access the corporate network, mobile and remote users inadvertently can infect the network with (10) and worms acquired from unprotected public networks. Hackers masquer-ading as internal users can take advantage of weak internal security to gain access to confidential information. 空白处（7）应选择（）

[单选题]下列不属于教育行政法规的文件是（　　）。

[名词解释题]审计目标

[单选题]魏晋时期盛行的是以下哪种选官制度？（）

[单选题]当鼻咽癌放疗到3600～4000cGy缩野时，一般上界、前界不动，后界一般到（）。

[单选题]下列情况下，不宜做超声引导下无水乙醇治疗的是（）。

[判断题]运输组织、服务质量、经营管理是铁路信息化的三大应用领域。

[单选题]DNA变性是指（　　）。

[单选题]若一台计算机的字长为4个字节，这意味着它（）。

[填空题]编组站、区段站的站修线与相邻一条线间，线间最小距离是（）mm。