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【判断题】
( ) 已知一无源二端网络,其端口电压和电流为关联参考方向,且电压、电流分别为: u =380 co s(314t +6 0 O )V , i =10s in (314t - 30 O )A ,则电压超前电流9 0 O 。A.
正确
B.
错误
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反馈参考答案：
举一反三
【单选题】She had recently left a job and had helped herself to copies of the company's client data, which she intended to ______ in starting her own business.
A.
dwell on
B.
come upon
C.
base on
D.
draw upon
【简答题】事先没有预定目的，也不需要意志努力的再现，称为（）。
【单选题】You work in a company which is named Wiikigo Corp. The company uses SQL Server 2008. You are the administrator of the company database. Now you are in charge of a SQL Server 2008 instance. You are goi...
A.
You should create a cached data collection
B.
You should create an on-demand non-cached data collection
C.
You should create a scheduled non-cached data collection.
D.
You should create two different SQL Agent jobs. The two jobs are scheduled at the same time. One job uploads the data collection and the other job creates a data collection.
【简答题】给出以下程序的运行结果。 int i=2; switch(i) { case 0: System.out.println(“0”); case 1: System.out.println(“1”); break; default: System.out.println(“default”); case 2: System.out.println(“2”); break; case 3: Syste...
【简答题】给出以下程序的运行结果。 int i=8; switch(i) { case 0: System.out.println(“0”); case 1: System.out.println(“1”); break; default: System.out.println(“default”); case 2: System.out.println(“2”); break; case 3: Syste...
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