搜题请搜索小程序“爱下问搜题”
问题 单项选择题

( )一般都比较具体详细，是进行环境管理、处理环境纠纷的直接依据。在环境保护法律法规体系中数量最多，占有重要的地位。

A．宪法关于环境保护的规定

B．环境保护基本法

C．环境保护单行法律规范

D．环境标准

答案

参考答案：C

单项选择题

目前被认为是唯一可用的高效冷化学灭菌剂是（）

A.甲醛

B.戊二醛

C.环氨乙烷

D.洗必泰
查看答案
单项选择题

Personal firewall is a technology that helps______intruders from accessing data on your PCvia the Internet or another network, by keeping______data from entering or exiting your system.
Hackers do not just target national security organizations for______: They want your taxreturns, network passwords, or bank account numbers. And you do not want the FBI kicking in yourdoor because someone hijacked your PC to______in the latest denial-of-service attack on theInternet. Now that "always-on" broadband connections such as cable modems and digital subscriberline are becoming more popular, home users are at risk. Fortunately, you can protect your data.Firewalls can block______ attacks and protect your PC from outside threats.

A．attacks

B．aggression

C．help

D．repair
查看答案