出自:佳木斯大学语言治疗学

测量仪表的准确度越高,则加权最小二乘中对应的权系数越小。 ( )
·正确
·错误
有功分量辨别法必须与带阻尼电阻的自动跟踪消弧线圈装置配套使用。 ( )
·正确
·错误
预测和计划性伪量测量的权重较大。 ( )
·正确
·错误
电力系统运行时的不安全状态属于警戒状态。 ( )
·正确
·错误
时间顺序记录的信息内容包括时间的名称,状态,发生地点。 ( )
·正确
·错误
调度自动化系统中的SCADA功能包括四遥信息的反映,事故数据记录,监视与事件处理。 ( )
·正确
·错误
PWM-电动机系统主电路线路简单,需要的功率器件少。 ( )
·正确
·错误
配电网的经济指标是煤耗。 ( )
·正确
·错误
在EMS中分析电力系统的电压失稳属于静态安全分析。 ( )
·正确
·错误
晶闸管-电动机系统需要快速回馈制动时,必须采用可逆线路。 ( )
·正确
·错误
RTU在遥测的主要作用是采集并传送电力系统运行的实时参数。 ( )
·正确
·错误
同步通信特点之一是( )。
·设备简单
·效率高
·效率低
·无时钟要求
直线视距传输的信道是( )。
·微波信道
·短波信道
·中波信道
·光纤信道
RS-422标准接口电路采用( )。
·平衡型
·开放型
·非平衡型
·异步方式
电力系统频率低于允许值范围时属( )。
·恢复状态
·正常状态
·紧急状态
·崩溃状态
独立运行电网AGC的功能可保证电网的( )。
·频率
·电压
·电流
·交换功率
配电网的经济指标是( )。
·煤耗
·功率因数
·电压
·网损
数字信号送入电力线载波机之前应( )。
·A/D转换
·进行调制
·进行解调
·D/A转换
霍尔模块的过载能力可达( )。
·10倍
·15倍
·20倍
·30倍
DMS的控制功能应具有控制( )。
·线损功能
·发电成本功能
·切除故障点功能
·频率功能
地区电网调度中心应负责( )。
·频率调整
·无功分配
·负荷管理
·电流调整
配电网实时网络接线分析应属( )。
·负荷预测
·优化调度
·网络状态监视
·配电网状态估计
厂站RTU向调度传送开关变位是( )。
·遥测
·遥信
·遥控
·遥调
对f0=50Hz工频信号交流采样时,若采样频率fs=9f0,采样周期电角度为( )。
·105°
·90°
·75°
·40°
300MHz电波信号属( )。
·微波
·长波
·中波
·短波
配电系统少人值守变电站应具有的基本功能是( )。
·自动重合闸功能
·变电站综合自动化功能
·遥控功能
·遥信功能
对f=50Hz工频信号交流采样时,若30°电角度采样一次,采样速率f应为( )。
·15f
·12f
·9f
·6f
The largest lake iBritaiis _____. ( )
·the Lough Neage
·Windermere Water
·ConistoWater
·the Lake District
The Renaissance begai____ ithe early ____ century.
·England, 14
·England, 15
·Italy, 14
·Italy, 15
The first inhabitants iBritaiwere _____.
·the Normans
·the Celts
·the Iberians
·the Anglo-Saxons
The Declaratioof Independence came from the theory of British philosopher _____. ( )
·Paul Revere
·JohLocke
·Cornwallis
·Frederick Douglass
The immigrants coming to Britaiare mainly from _____.
·Europe
·the United States
·Africa
·the West Indies, Indies and Pakistan
Many early Chinese immigrants worked ithe mining industry, especially ithe _____. ( )
·gold mines
·silver mines
·coal mines
·copper mines
Ithe 18th century, there appeared ____ iEngland, which owed a great deal to the inventioof machines.
·the Industrial Revolution
·the Bourgeois Revolution
·the Wars of the Roses
·the Religious Reformation
British Recorded history begawith _____.
·Romainvasion
·the NormaConquest
·the Viking and Danish invasion
·the Anglo-Saxons invasion
British Recorded history begawith _____. ( )
·Romainvasion
·the NormaConquest
·the Viking and Danish invasion
·the Anglo-Saxons invasion
Multiple Choices: Choose one right answer from the four choices: 1. The highest mountaiiBritaiis ____.
·Scafell
·BeNevis
·the Cotswolds
·the Forth
The number of Congressmefrom each state varies depending o_____.
·the size of the area
·the size of the population
·the tradition
·the wealth
The US Federal Government is composed of the following except _____.
·the legislative
·the standing committee
·the judicial
·the executive
The members ithe Senate must be at least _____ years old and those ithe Representative _____ years old.
·40, 30
·30, 26
·30, 25
·25, 30
The law-making or the legislative body ithe government is _____.
·the Supreme Court
·the Congress
·the Cabinet
·the president’s committee
years study.
·credits
·grades
·scores
·classes
The students of the universities ithe second year are called ________.
·junior
·sophomore
·freshma
·senior
How ofteare Presidential elections held
·Every 3 years
·Every 4 year
·Every 5 years
·Every 6 years
Which Scottish lake is supposedly home to a mythical monster
·Lough Neagh
·Loch Ness
·Lake Windermere
·Loch Lomond
What is the national anthem of the United Kingdom
·Rule Britannia
·Meof Harlech
·God Save the King (Queen)
·Swing Low Sweet Chariot
What is the oldest university ithe United States
·Columbia University
·Stanford University
·BrowUniversity
·Harvard University
Which of the following institutions is part of the Judicial Branch of the federal government
·The House of Representatives
·The Supreme Court
·The Senate
·Congress
During the AmericaCivil War, what were the elevesoutherslave states called
·The Confederate States of America
·The United States of America
·The Union
·The Tea Party
Which AmericaPresident created aeconomic placalled the ‘New Deal’
·Herbert Hoover
·FrankliD. Roosevelt
·Ronald Reagan
·JohF. Kennedy
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