题目内容

为什么白矮星没有由气体组成的普通恒星所具有的典型特征，为什么白矮星在发射光辐射时没有那种大得可以观测得到的收缩和变热。

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All client computers on your company network run Windows 7 and are members of an Active Directory Domain Services domain. Your company policy requires that all unnecessary services be disabled on the computers. The Sales department staff has been provided with new mobile broadband adapters that use the Global System for Mobile Communications (GSM) technology. You need to ensure that portable computers can connect to the broadband GSM network. Which service should be enabled on the portable computers?（）

A. WLAN AutoConfig
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D. Portable Device Enumerator Service

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