题目内容

绝缘子的预防性试验要求，35kV及以下的支柱绝缘子的绝缘电阻值，应不低于（）

A. 100MΩ
B. 300MΩ
C. 500MΩ
D. 1000M&Omega

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In order to enhance worker productivity， a Cisco wireless network has been implemented at all locations. Which three statements regarding WLAN are true？（）

A WLAN client will operate in half-duplex mode.
B. The Aironet 1230 access point is an example of an access point that operates solely as a lightweight access point.
C. Ad hoc mode allows mobile clients to connect directly without an intermediate A
D. WLANs are designed to share the medium and can easily handle an increased demand of channel contention.
E. A lightweight AP receives control and configuration from a WLAN controller to which it is associated.
F. Another term for infrastructure mode is independent service set （IBSS）.

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