燃烧煤和石油产品后排放到大气中的废气，造成酸雨的气体是（）。
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Which three user interfaces exist for the Cisco WLAN Controllers？（）
A. Wireless LAN Solution Engine （WLSE）
B. command-line interface （CLI）
C. Wireless Control System （WCS）
D. TFTP
E. an HTTPS web user interface
F. an HTTP web user interface
The Cisco SDM will create a QoS policy that provides services to two types of traffic. Which two statements indicate the default QoS parameters that are created by SDM？（）
A. Business-critical traffic will be sorted into two QoS classes.
B. Real-time traffic will be sorted into one QoS class.
C. Voice traffic will be considered real-time traffic while call signaling will be considered business-critical.
D. All traffic except real-time will be considered best-effort.
E. Routing， management， and transactional traffic will be considered business-critical.
F. Voice and call signaling traffic will be considered real-time.
下列HBV感染标志物均可表示HBV复制，但应除外（）
A. HBV-DNA
B. HBeAg
C. HBsAg
D. HBcAg
E. HBV-DNAp
What can be used to maintain the voice quality on a link by limiting the number of calls that can be active at any given time？（）
A. Call Management Link Agent
B. Traffic policing
Call Admission Control
D. QoS Link Congestion Management
E. Oversubscription Link Detection
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