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问题 单项选择题

静电接地时，因为静电泄漏电流很小，所有单纯为了消除导体上静电的接地，其防静电接地电阻原则上不得超过1MΩ即可，但出于检测方便等考虑，规程要求接地电阻不应大于( )Ω。

A．80
B．90
C．100
D．110

答案

参考答案：C

单项选择题

下列针灸配方中，称为”开四关”的是（）

A、内关外关

B、上关下关

C、合谷太冲

D、腰阳关膝阳关
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单项选择题

NAC’s (Network Access Control) role is to restrict network access to only compliant endpoints and (66) users. However, NAC is not a complete LAN (67) solution; additional proactive and (68) security measures must be implemented. Nevis is the first and only comprehensive LAN security solution that combines deep security processing of every packet at 10Gbps, ensuring a high level of security plus application availability and performance. Nevis integrates NAC as the first line of LAN security (69) . In addition to NAC, enterprises need to implement role-based network access control as well as critical proactive security measures—real-time, multilevel (70) inspection and microsecond threat containment.

（66）（）

A.automated

B.distinguished

C.authenticated

D.destructed
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