能够获得专利的发明创造,不论是产品发明还是方法发明,都必须具有()、新颖性和()。
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You have a print server that runs Windows Server 2003 Service Pack 2 (SP2). You need to receive a notification each time a document fails to print. What should you do? ()
A. From the Performance console, create an alert.
B. From the Event Viewer console, create a new filter.
C. From the Printer Server properties, modify the Advanced settings.
D. From the Services console, enable and configure the Messenger service.
某小区配置载频为5个,SDCCH信道设置为2,无CBCH信道,FPDCH信道配置为4,开启了半速率功能,请问此小区理论上最大可同时承载多少话音呼叫数?
在电感电路中,电感不消耗能量,在电感和电源之间进行能量交换,电感吸收无功功率。()
A. 正确
B. 错误