简述计算机网络安全的定义。
参考答案:
计算机网络安全是指利用管理控制和技术措施,保证在一个网络环境里,信息数据的机密性、完整性及可使用性受到保护。
WebSQL is a SQL-like (1) language for extracting information from the web. Its capabilities for performing navigation of web (2) make it a useful tool for automating several web-related tasks that require the systematic processing of either all the links in a (3), all the pages that can be reached from a given URL through (4) that match a pattern, or a
combination of both. WebSQL also provides transparent access to index servers that can be queried via the Common (5) Interface.
5.见题干()
A. Router
B. Device
C. Computer
D. Gateway
男性,40岁,因右前臂卷入机器引起右手伸指困难,伴轻度疼痛。检查:一般情况良好,右上臂和前臂均肿胀,无皮肤挫裂伤,右手手指不能伸直,右肘和腕关节活动良好,手部血液循环良好,X线片未发现骨关节损伤,应诊断为
A.桡神经损伤(位于肘部以下)
B.桡神经损伤(位于肘部以上)
C.桡神经损伤(位于腋部)
D.桡神经损伤(位于腕部)
E.桡神经浅支损伤