The commutator can change current direction in the conductor
答案是：×
更新时间:2023/4/3 12:59:00
出自:西安交通大学专业英语
In China alternating current is usually generated at 60Hz
答案是：×
更新时间:2023/4/3 12:59:00
出自:西安交通大学专业英语
Electron will flow through a conductor from the positive terminal to the negative terminal
答案是：√
更新时间:2023/4/3 12:59:00
出自:西安交通大学专业英语
An output device, such as a keyboard or mouse, gathers input and transforms it into a series of electronic signals for t
答案是：×
更新时间:2023/4/3 12:59:00
出自:西安交通大学专业英语
A digital computer controlled system is only designed for discrete variable
答案是：×
更新时间:2023/4/3 12:59:00
出自:西安交通大学专业英语
A computer.s microprocessor only understands high-level language
答案是：×
更新时间:2023/4/3 12:59:00
出自:西安交通大学专业英语
When an induction motor with 10 poles is supplied by 50Hz three-phase ac power source, the synchronous revolutions per m
答案是：600
更新时间:2023/4/3 12:59:00
出自:西安交通大学专业英语
The precision of ADC ( analog-to-digital conversion ) is determined by___.A. its speedB. its gainc. the accuracy of the
答案是：the number of binary bits
更新时间:2023/4/3 12:59:00
出自:西安交通大学专业英语
The hydropower is well suited for switching according to_ command to meet changing power needs.A. a consumer.sB, a user
答案是：a dispatcher's
更新时间:2023/4/3 12:59:00
出自:西安交通大学专业英语
The generator voltages are usually stepped up to the transmission voltage level by__.A. series capacitorR. parallel reac
答案是：step-up transformers
更新时间:2023/4/3 12:59:00
出自:西安交通大学专业英语
The DC-DC converts__ input to_ output.A. direct current, alternating currentB. direct current, direct currentc. alterna
答案是：direct current, direct current
更新时间:2023/4/3 12:59:00
出自:西安交通大学专业英语
The Buck(降压式变换器) isa___ converter.A. voltage step-upB. current step-downc. current step-upD, resistance
答案是：current step-up
更新时间:2023/4/3 12:59:00
出自:西安交通大学专业英语
In North American_ is adopted as standard frequency in electric power system.A.25HzB.50Hzc.60HzD, 125Hz
答案是：60Hz
更新时间:2023/4/3 12:59:00
出自:西安交通大学专业英语
In cogeneration (热电联产，热电联供 ) systems, the overall energy effincies are raised by_.A, important the combustion processB.
答案是：providing thermal energy to the customers
更新时间:2023/4/3 12:59:00
出自:西安交通大学专业英语
In a coal-fired power plant, an electrostatic precipitator is used to remove__ from the combustion gases. A. solid par
答案是：solid particle
更新时间:2023/4/3 12:59:00
出自:西安交通大学专业英语
Delphi belongs to_ A. low-level programming languageB. high-level programming language c. a programming language co
答案是：high-level programming language
更新时间:2023/4/3 12:59:00
出自:西安交通大学专业英语
A D/A is a device that can convert a digital signal to the equivalent_A. digital formB, numerical formc. binary formD, a
答案是：analog form
更新时间:2023/4/3 12:59:00
出自:西安交通大学专业英语
A computer printer is_ device that produces computer-generated text or graphical images on paper.A an inputB, an outputc
答案是：an outputc
更新时间:2023/4/3 12:59:00
出自:西安交通大学专业英语
The relation results in_A. nullB. identityc. indefinite valueD, zero
答案是：identity
更新时间:2023/4/3 12:59:00
出自:西安交通大学专业英语
___ is used as coolant in light-water reactors.A Gas B. Organic compoundc. Molten saltD. Water
答案是：Water
更新时间:2023/4/3 12:59:00
出自:西安交通大学专业英语
__ carries data out to speakers and headphones, or back from a microphone.A. A graphics cardB. A modem .c. A network car
答案是：sound card
更新时间:2023/4/3 12:59:00
出自:西安交通大学专业英语
The unit of logarithm of the magnitude of a transfer function is__A. radians per secondB. voltsc. decibelD. octaves
答案是：decibel
更新时间:2023/4/3 12:59:00
出自:西安交通大学专业英语
The transformer is a straightforward application of Faraday.s___ Law. A. Ohm.sB. Electromagnetic Inductionc. Kirchhoff.s
答案是：Electromagnetic Induction
更新时间:2023/4/3 12:59:00
出自:西安交通大学专业英语
The system.s characteristic equation can be used to determine. of a linear time-invariant system. A the stability B.
答案是：the stability
更新时间:2023/4/3 12:59:00
出自:西安交通大学专业英语
The algebraic sum of all votages around a loop is_ A. zero B. indefinite valuec. sum of voltage risesD. sum of voltage
答案是：zero
更新时间:2023/4/3 12:59:00
出自:西安交通大学专业英语
Resistors are. elements. A. passiveB. active c. independent sourcesD. dependent sources
答案是：passive
更新时间:2023/4/3 12:59:00
出自:西安交通大学专业英语
ON-OFF information can be represented by__ signal.A. a digitalB, an analogc. a discreteD, a control
答案是：a digital
更新时间:2023/4/3 12:59:00
出自:西安交通大学专业英语
An expansion slot is a long. narrow socket on the motherboard into which you can plug___ A an expansion cardB. a modem
答案是：an expansion card
更新时间:2023/4/3 12:59:00
出自:西安交通大学专业英语
A computer.s microprocessor only understands. in binary form.A high-level languagesB, machine languagec. human language
答案是：machine language
更新时间:2023/4/3 12:59:00
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