第12题: [单项选择]A network vulnerability scanner is part of which critical element of network and system security?() A. host security B. perimeter security C. security monitoring D. policy management 参考答案:C
第13题: [单项选择]血脑屏障的结构基础是() A. 桥粒 B. 缝隙连接 C. 黏着斑 D. 黏着带 E. 紧密连接 参考答案:E