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【单选题】
You work as an administrator at ABC.com. The ABC.com network consists of a single domain named ABC.com. All servers in the ABC.com domain， including domain controllers， have Windows Server 2012 R2 installed.You have installed the DNS Server Role on a ABC.com server， named ABC-SR13. ABC.com’s workstations make use of a web proxy to access the Internet， and refer to ABC-SR13 as a primaryDNS server.You have been instructed to make sure that Internet host names for ABC.com’s workstations are not resolved by ABC-SR13. Which of the following actions should you take？（）A.
You should consider configuring a primary zone on ABC-SR13.
B.
You should consider configuring a secondary zone on ABC-SR13.
C.
You should consider configuring a reverse lookup zone on ABC-SR13.
D.
You should consider configuring a forward lookup zone on ABC-SR13.
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【简答题】复合按钮按下时,触点通断情况是 A 、常开触点先闭合,常闭触点后断开 B 、常闭触点先断开,常开触点后闭合 C 、常开触点先闭合,常闭触点后断开 D 、常闭触点断开与常开触点闭合同时
【简答题】18x6.07 =
【单选题】关于对空调制冷原理的描述,下面正确的选项是( )。
A.
在空调的冷凝器内,制冷剂从气态变成液态;
B.
空调热交换器中,蒸发器是用来散热的,冷凝器是用来吸热的;
C.
空调压缩机润滑油的牌号越大,粘度越小,凝固点越低;
D.
空调制冷系统中,制冷剂越多,制冷能力越强。
【简答题】空调压缩机润滑油的牌号越大，粘度（）；凝固点（）。