In a modern three-phase A-Csynchronous brushless generator, the excitation winding is on the rotorThat means （）.
A . The generator needs not excitation
B . The winding on the rotor is for inputting excitation current
C . There are three phase windings on the rotor
D . The generator has brushe
相似题目
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The output voltage of a three-phase alternator is regulated by the （）.
A . AC voltage to the armature
B . AC voltage to the field
C . DC voltage to the armature
D . DC voltage to the field
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In modern fathometers the sonic or ultrasonic sound waves are produced electrically by means of a(n)（）.
A . transmitter
B . transducer
C . transceiver
D . amplifier
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What will be the phase angle relationship of a six-pole, three-phase, rotating field generator （）.
A . 60
B . 120
C . 180
D . 360
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In a three-phase circuit, the phase voltages are （）
A . 120°apart
B . 160°apart
C . 180°apart
D . 360°apart
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In modern linguistic studies, the written form of language is given more emphasis than the spoken form for a number of reasons.
A . 正确
B . 错误
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If travel in Iran, foreign ladies are better off dressing like a modern Iranian woman.
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Literary modernism has its origins in the early 19th century, mainly in Europe and North America, and is characterized by a self-conscious break with traditional modes of representation.
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The article is a condensed and adapted version of the preface to the book “Conflict and Consensus in Modern American History”.
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______ contributed a lot to the revolution in technique of modern poetry.
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“__________” can best describe this: “Professor Pepin spends a lot of time translating medieval texts on ancient medicine, however, he also stays informed about the latest developments in modern asthma treatments.”
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The problem is __ __ __we can master modern science and technology in a short time. A. if B. that C. what D. how
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The government has announced that a modern city will be set up in _____ is still a wasteland now.
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The Waste Land presents a panorama of ______ in the modern western world, but also reflects the prevalent mood of ______ a whole post-war generation.
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If a person stays in a modern hotel with latest comforts for a night______.
A．he will become poor
B．he has to pay a lot of money
C．he has to spend all the money he was in the bank
D．he has to pay some money
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Fill in the blank with the right form of the given word.The __________ (produce) of a mathematical formula by mathematics and physics experts explains the modern phenomena of network science.
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In the trade of modern society the transmission of information plays as important a role as__________
<img src='https://img2.soutiyun.com/ask/uploadfile/3183001-3186000/80ca83135bdee879f55784001f940915.gif' />
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In a modern three-phase A.Csynchronous brushless generator, the excitation winding is on the rotorThat means _____.
A.The generator needs not excitation
B.The winding on the rotor is for inputting excitation current
C.There are three phase windings on the rotor
D.The generator has brushes
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The modern sailing ship was developed by a man who never went to sea. He was Prince Henry of Portugal, the younger son of the Portuguese king and in English princess.
Prince Henry lived in the fifteenth century. As a boy he became devoted to the sea, and he dedicated (devoted) himself" to improving the design of Ships and the methods or sailing them. In 1416, when he was twenty-two. Henry founded a school for mariners, to which he invited everyone who could help him —— Jewish astronomers, Italian and Spanish sailors, and Arab mathematicians and map makers who knew how to use the crude compass of the day and could improve it.
Henry's goal was to design and equip vessels that would be capable of making long ocean voyages without having to hug (keep close to) the shore. The caravel carried more sail and was longer and slimmer than any ship then made, yet was tough enough to withstand gales at sea. He also developed the carrack, which was a slower ship, but one that was capable of carrying more cargo.
To Prince Henry the world owes credit far development of craft that made oceanic exploration possible. He lives in history as Henry the Navigator.
1.Prince Henry's principal achievement was that of ______
A、making oceanic exploration possible
B、improving the compass
C、founding a school for mariners
D、inventing the clipper ship
2.Prince Henry''s goal was to design vessels that could ______.
A、make long deep-sea voyages
B、travel faster than those in use at that time
C、explore the coastline of. Portugal
D、carry larger crews and more cargo than existing ones
3.Prince Henry started his school for the purpose of ______.
A、helping mariners
B、improving ship design and sailing methods
C、studying astronomy and mathematics
D、improving his own skill as a sailor
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In a modern internal combustion diesel engine, the load carrying part of the engine is referred to as the________.
A.bedplate or base
B.sump or oil pan
C.cylinder block
D.frame.
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Even in a highly modernized country,manual work is a still needed．（）
<img src='https://img2.soutiyun.com/ask/uploadfile/2583001-2586000/da99ea4d2fe90f2f6c2ee6c1f964e9f5.gif' />
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Even in a highly modernized country， manual work is still needed-
A．physical
B．mental
C．natural
D．hard
此题为多项选择题。
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______is a poem by William Carlos Williams that centered in an in-depth look at the process of modernization and its effects.
A．Paterson
B．Red Wheelbarrow
C．The Widow"s Lament in Springtime
D．Sour Grapes
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I'd like to buy a house-modern, comfortable, and ______in a quiet neighborhood.
A．in all
B．above all
C．after all
D．at all
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Workers in modern society do not care about the relation between what he produces and society as a whole.（)
是
否
