加药装置的主要结构有（）A.加药泵 B.加药箱 C.配套搅拌装置 D.压力表

什么是防爆型电气设备？

下列关于我国公民参与政治生活的表述不正确的是

A．公民实行民主监督必须选择合法的渠道

B．公民可以直接参与政府所有的决策

C．公民参与基层民主管理是人民当家作主最有效的途径

D．公民参与民主选举应出于公心，以人民的利益为重

铁观音介于（）和（）之间，属于半发酵茶。

A.绿茶，红茶

B.绿茶，黄茶

C.红茶，黑茶

D.绿茶，青茶

临床化学酶活力测定一般采用（）

A.一点法

B.两点法

C.浊度法

D.双波长法

E.连续监测法

NAC’s (Network Access Control)role is to restrict network access to only compliant endpoints and (1) users. However, NAC is not a complete LAN (2) solution; additional proactive and (3) security measures must be implemented. Nevis is the first and only comprehensive LAN security solution that combines deep security processing of every packet at 100Gbps, ensuring a high level of security plus application availability and performance. Nevis integrates NAC as the first line of LAN security (4) In addition to NAC, enterprises need to implement role--based network access control as well as critical proactive security measures-real-time, multilevel (5) inspection and microsecond threat containment.

(4)

A．defense

B．intrusion

C．inbreak

D．protection