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作者2023-07-14 20:12:10机械习题 78 ℃

in a broad sense, a sentence is composed of two parts: the subject and the predicate.

in the sentence: "it is hard for the boy to get the book on the shelf.", "the boy" is the logical subject.

a linking verb is a verb form to link the subject and the complement or predicative.

the predicate part may comprise predicate verb, object, complement and adverbial.

a finite verb form can change according to tense and subject.

a non-finite verb form can change according to tense and subject.

a gerund performs the same functions as a noun.

if the verb is intransitive, then its -ed participle only indicates a finished action, and -ing participle an on-going action

henry bought his mother some flowers. in this sentence, 'some flouwers' is the direct object.

in the sentence "i found her a lovely girl", "a lovely girl" is the complement to the object.

please tell the function(s) of the underlined part(s) in each sentence. how many pairs of shorts should you and your brother bring?

please tell the function(s) of the underlined part(s) in each sentence. celine teaches the children spoken english.

please tell the function(s) of the underlined part(s) in each sentence. the directors appointed him sales manager.

please tell the function(s) of the underlined part(s) in each sentence. he found it astonishing how they could accomplish it.

please tell the function(s) of the underlined part(s) in each sentence. she imagined it easy to learn a language. what does the underlined part function as?

it is ___ who am to blame.

___ the piano is one of my favorite pastimes.

____ is for him to decide.

i shall see to ___ that he is taken good care of when you are absent.

i saw ____.

the early achievements in space exploration were all crash-landings, each spacecraft _________.

"eric nearly always wins the science award." "that's because his projects are __________."

please identify the subject of the main clause in the following sentence. then, with world war ii, came the development of the weapon that has since become a general threat to life on earth: the atomic bomb.

which of the underlined parts in the four sentences functions differently from the others?

which of the underlined what- structures functions differently from the others?

i was awake now. i was wondering what had happened to her.

attributives refer to words, phrases or clauses that are used to modify nouns or pronouns.

adverbial isn't required for a complete sentence, but is necessary for specific image presentation.

many phrases can be used as adverbials referring to time, causes, conditions, concession, purposes, and exceptions, etc.

a compliment is a part of a sentence that gives more information about the subject, or, in some structures, about the object.

please tell the function(s) of the underlined part(s) in each sentence. she imagined it easy to learn a language. what does the underlined part function as?

please tell the function(s) of the underlined part(s) in each sentence. tom flung open the door and rushed out of the room, totally losing his calmness.

please tell the function(s) of the underlined part(s) in each sentence. in general, the controls imposed upon children represents the needs of parents and the values of the community as much as the child's own happiness and well-being.

please tell the function(s) of the underlined part(s) in each sentence. the ultimate objective of cloning technology is to cure human diseases.

please tell the function(s) of the underlined part(s) in each sentence. similarly, we feel comfortable with people with physical qualities similar to ours.

please choose the best answer for each incomplete sentence. the early achievements in space exploration were all crash-landings, each spacecraft _________.

please choose the best answer for each incomplete sentence. "eric nearly always wins the science award." "that's because his projects are __________."

please choose the best answer for each incomplete sentence. the hostess always prepares corned beef and sometimes an ____________ vegetable.

please choose the best answer for each incomplete sentence. kill and i will meet some friends ____________________________.

please choose the best answer for each incomplete sentence. it is considered very __________ to eat in the classroom and most schools have a separate cafeteria.

where does she come from is still a secret.这是一句语法错误的句子。

object clauses usually begin with subordinating words like how, why, what, where, and whether, etc.

we use a relative clause to give additional information about something without starting another sentence.

the antecedent of "when" includes time, day, season, age, occasion, etc.

______ makes the school proud was ________ more than 90% of the students has been admitted to key universities.

it is known to all that_______ you exercise regularly, you won’t keep good health.

________some people regard as a drawback is seen as a plug by many others.

do you know ________ this time yesterday?

—what did your parents think about your decision? — they always let me do ________ i think i should.

the hours _______ the children spend in their one-way relationship with television people, undoubtedly affect their relationships with real-life people.

no one can use cell phones in any areas at the hospital _______ equipment might be affected by the interference from cell phones.

the atmosphere at the college is that of an environment _______ a relationship of mutual respect is encouraged between students and tutors.

many economists believe that advertising helps increase competition, _______ leads to lower prices, thus benefiting consumers and the economy as a whole.

_______ is common knowledge, she is very popular among her students.

“where” refers to a place in the non-restrictive relative clause.

the zero relative pronoun cannot be the subject of the verb in the relative clause.

critici and self-critici is necessary _______ it helps us correct our mistakes. which answer is correct ? a. before b. in that c. so d. when

adverbial clauses are those that perform the function of adverbial in a complex sentence.

she got up early so that she caught the bus. in this sentence, "so that" introduces the clause of _______. a. result b. purpose c. condition d. concession

if the clauses talk about the unreal condition or the condition that is contrary to fact, subjunctive mood will be used.

which of us _______ knows something about physics does not know this ?

to a highly imaginative writer, _______ is a pad of paper and a pen.

_______ can be seen from the comparison of these figures, the principle involves the active participation of the patient in the modification of his condition.

this is an exciting area of study, and one _______ new applications are being discovered almost daily.

—is that the all town you often refer to? —right, just the one _______ you know i used to work for years.

请在划线处填上适当的词,使得两个短句的合并句子正确并完整。 a. you keep walking. b. you arrive at the destination. _______you keep walking, you will arrive at the destination.

请在划线处填上适当的词,使得两个短句的合并句子正确并完整。 a. chinese people have realized it. b. happiness comes from hard work. n chinese people have realized ______ happiness comes from hard work.

请在划线处填上适当的词,使得两个短句的合并句子正确并完整。 a. the people have granted power to us. b. we must serve the people wholeheartedly. the people have granted power to us, ________ we must serve them wholeheartedly.

an appositive can be a noun, a noun phrase, or a noun clause.

the appositive clause has the function of an attribute, identifying and renaming the noun before.

a predicative typically express a property assigned to a "subject", i.e., the subject of the main clause.

as families move away from their stable community, their friends of many years, their extended family relationships, the informal flow of information is cut off, and with it the confidence that information will be available when needed and will be trustworthy and reliable. 请问这个句子的同位语成分是哪个?

the question is _____ the film is worth seeing.

see the falgs on top of the building? that was_____ we did this morning.

information has been put forward ________ more middle school graduates will be admitted into universities.

doris' success lies in the fact__________ she is cooperative and eager to learn from others.

an independent clause is a clause that can stand alone as a sentence.

a compound sentence is a sentence that has a t least two independent clauses joined by a comma, semicolon or coordinating conjunction.

a complex sentence is a sentence with one independent clause and at least one dependent clause.

a cleft sentence is an emphatic construction with non-referring it as formal subject.

five people won the “china’s green figure” award, a title ______ to ordinary people for their contributions to environmental protection.

i was told that there were about 50 foreign students ______ chinese in the school, most ______ were from germany.

everywhere you can see people in their holiday dress, ______ with iles.

many students ______ around, i explained the story into details.

i have five friends, some of ______ are businesen.

i have five friends, but none of ______ are business-men.

________ at the photos, illustrations, title and headings and you can guess what the reading is about.

when the united states entered just such a glowing period after the end of the second world war, it had a market eight times larger than any compe, giving its industries unparalleled economies of scale. 这句话中,giving its industries unparalleled economies of scale,充当的成分是:

the coming of age of the postwar baby boom and an entry of women into the male-dominated job market have limited the opportunities of teenagers who are already questioning the heavy personal sacrifices involved in climbing japan's rigid social ladder to good schools and jobs. 这句话,有几个主语?

in fact, it is difficult to see how journalists who do not have a clear grasp of the basic features of the canadian constitution can do a competent job on political stories. 这句话真正的主语是?

i have excluded him because, while his accomplishments may contribute to the solution of moral problems, he has not been charged with the task of approaching any but the factual aspects of those problems. 此句中because 后面的从句是:

however, whether such a sense of fairness evolved independently in capuchins and humans, or whether it stems from the common ancestor that the species had 35 million years ago, is, as yet, an unanswered question. 这个句中的主语从句有几个?

请问哪个选项可以更好地把句子补充完整? the world wildlife fund has declared that global warming, _____________________________, will create havoc among migratory birds by altering the environment in ways harmful to their habitats.

such large, impersonal manipulation of capital and industry greatly increased the numbers and importance of shareholders as a class, an element in national life representing irresponsible wealth detached from the land and the duties of the landowners; and almost equally detached from the responsible management of business. 这个句中后置定语有几个?

among the many shaping factors, i would single out the country's excellent elementary schools; a labor force that welcomed the new technology; the practice of giving premiums to inventors; and above all the american genius for nonverbal, "spatial" thinking about things technological. 此句中并列宾语有几个?

自选1个经典的英语长句、难句,自行分析其句子成分和成分之间关系,指出句子主干,并将其翻译成中文。

the axe is __________ the hoe.

which is _____ of the two watches?

this is _________ at the meeting.

where tuberculosis had vanished, it came back; in many places where it __________ away, it grew worse.

do you wish your breakfast ___ to your room, madam?

____ college students should learn more about chinese history.

he is satisfied with ___ his son has achieved.

the students expected there ___ more reviewing classes before the final exams.

it was a matter of ___ would take the position.

i want you to keep me ___ of how things are going with you.

the authority did not only accept their terms, ___ put them all into prison.

my mind wandered ___ in grammar class.

the patient wanted _____ good care of by the nurses.

they preferred her ___ out after bedtime.

she can’t help ___ whether we should risk ___ there.

he has made it clear ___ he won’t agree to the plan.

do you mind ___oking?

ronnie looked sweet, sitting there _______, he dark, curly head bent, and her brown eyes ________ her needle.

identify the verb class in the sentence “the soup tastes better now”.

the problem is __________ they can complete the project on time.

the mere fact ____ most people believe nuclear war would be madness does not mean that it will not occur.

evidence came up ______ specific speech sounds are recognized by babies as young as 6 months old.

“the purpose of the exchange program is to promote the understanding between the two countries.” the underlined part is the _________ of the sentence.

_______ seems clear that homer’s account of a trojan war hast at least some basis in historic fact.

your proposal that they ____ their conversation in french is quite reasonable.

_______ public acceptance of a single yardstick of time, social life would be unbearably chaotic.

it is only in the most difficult circumstances _______ one’s moral character can be fully tested.

they are determined that farmers _______ from the government.

how can i concentrate if you _________ continually ______ me with silly questions?

she is a better speaker than _____ in the class. 

________ your advice, i would have made the wrong decision.

the experiment requires more money than _______.

she did her work ______ her manager had instructed.

jean-philippe siblet, an ornithologist at the natural history museum in paris, linked the seagulls’ move to the city to their growing difficulty in finding food along the coasts, ecosystems are increasingly upset by touri and construction.

disney is rebooting home alone and night at the museum for its new tv streaming service, is intended to rival netflix.

concerns the fashion industry in the united kingdom is becoming increasingly dominated by throwaway “fast fashion” have again been highlighted by an investigation that shows that britons now buy five times as much clothing per year as they did in 1980s.

on wednesday, temperatures continued to soar across many parts of japan, with the mercury above 35c in numerous regions.

problems of upbringing are recognized to be problems of relationships within the inidual family, the first necessity __________ a secure emotional background with parents who are united in their attitude to their children.

high school and college offer you the best chance to learn broadly --- math, history, various sciences --- and to do projects with other kids that teach you firsthand about group dynamics. what does the underlined "that" refer to?

the phenomenal growth of internet businesses is already fueling a klondike-style gold rush with far too many diggers _________ for far too little gold.

下列哪一个句子中v-ing的用法不同于其它?

there is no doubt, however, that it is the increasing number of applicants with university education at all points in the process of engaging staff that has led to the greater importance of the curriculum vitae. what does the underlined "that" refer to?

non-traditional students, _____________ female, began to study on a part-time basis, the numbers of women going to graduate school increased, and women sought entry to the non-traditional position of university faculty member.

women who live in areas of high air pollution, ___________ invisible particles from traffic fumes, coal-fired power stations and wood fires, are at increased risk of heart disease and death, according to a study.

if i ever had any doubts about how demanding a teacher's job is, it would have disappeared for good when i spent some time recently in schools. 该复杂句中不含有:

if you want to write long sentences, please make sure that the sentence is under control from beginning to end, in syntax and punctuation, so that the reader knows where he is at every step of the winding trail. 该长句中含有:

_______ high mountains _______ into jagged rocky waters, fiordland has never had any significant permanent population.

group a worked uninterrupted in a sound-proof room; group b was subjected to continuous noise. what is the function of the underlined "uninterrupted"?

in studies, subjects asked to distinguish truth from lies answer _______________.

we had initially planned to remove all of the old furniture from the storage area, but we decided against doing so because it ________ too much time.

poets during the romantic period felt __________ to express emotions in their writing than did poets of the victorian period.

it seems for her to be very happy today.

because ill, he didn’t attend the meeting.

although was frightened, he managed to run away.

he is double her age.

his wife, i presume, was not listening to him.

the inhabitants don’t like discomfort, and have developed advanced techniques to make summer life tolerable; air-conditioning is one of the symbols of a home or office or factory that are based on reasonable economic success.

only when the process of meeting the basic need for food reached a certain level of sophistication it was possible for humans to follow other pursuits such as the founding of cities.

high school and college students today are pushed so much in the direction of specialization that little time is left for the further development of the basic reading skills initiating in earlier years.

helen was much kinder to her youngest child than she was to the others, what, of course, made them jealous.

on no account would i borrow money from friends , and still less i would be dependent on the favors of rich relatives.

i have a good friend who’s name is liu mei.

soon i began to enjoy talk to myself on paper.

there will an important game next year.

my pronunciation is terribly.

since her huand had died, so she had to support her family.

animation film ne zha, based on a chinese folktale in which the young hero name ne zha fights a dragon king for sake of the people, has created a box office miracle in china this summer, grossing at least 2 billion yuan in less than two weeks and set a new record for chinese animations.

beijing welcomes constructive ideas from other countries and regions to facilitate hong kong’s further development, it will be vigilant against disruptive elements and will never tolerate outside intervention in hong kong.

in the past nine years, yanchang, china’s fourth-largest oil company, has invested more than 47 billion yuan in technological innovations, which has cemented its status as shaanxi’s largest state-owned enterprise and the biggest contributor to the province’s finances through tax.

the united states has a high number of people of irish ancestry, which form an influential political bloc.

during the first six months of this year, major chinese internet companies saw revenue rise by 17.9 percent on an annualized basis, while internet platforms helped add over 60 million jobs in 2018.

after the people of two countries come to understand each other and their interests are intertwined, relations between their governments and countries will be stable and peace and development will also be guaranteed.

his dream of learning chinese is on the way to being fulfilled before he enrolled at the confucius institute earlier this year.

europe is edging toward a crisis, as several of its largest economies face recession or a political crisis, ysts have said.

at monday's news conference, trump spoke as if the idea of making money off the summit never entered his mind.

the average concentration of pm 2.5 in this city has been the lowest last month until the data was first collected in 2013.

although he has finally decided to dispatch armed forces to fight the fires, brazilian president attributed the fires to dry, hot weather and the deliberate actions of nongovernmental organizations whose funding has been cut.

where there is grass, there are grasshoppers.

i'm honored to be with you today so that you accomplished something i never could.

if i get through this speech, it'll be the first time i actually finish something at harvard.

before i had to understand everything about connecting people if i began, i never would have started facebook.

cathy was the first girl whom i saw on the campus. => cathy was the first girl ____ on the campus.

women who look after all children generally get paid with $8-12 an hour. => women ____ after all children generally get paid with $8-12 an hour.

this book, which was written in simple english, is suitable to beginners. => this book ____ in simple english is suitable to beginners.

there is no hope that i will get another gift from my parents. => there is no hope ____ another gift from my parents.

there is a possibility that he has arrived this morning. => there is a possibility ____ this morning.

when he had grown up in a slum in new york, he made up his mind to be a millionaire. => ____ up in a slum in new york, he made up his mind to be a millionaire.

i should recommend that you be more careful. => i should recommend you ____ more careful.

members of the government acknowledge that many of their predictions were over-optimistic. => members of the government acknowledge many of their predictions ____ over-optimistic.

although most people once thought that it was impossible, several climbers have now scaled the north face of the eigar in winter. => although most people thought it ____ impossible, several climbers have now scaled the north face of the eigar in winter.

漂亮行走的要求不包括 ?

通过舞蹈,可以培养的身体修养是 。

快节奏的音乐可以慢跳。

舞蹈的身体表现特征?

舞蹈动作语言的变化是无穷尽的。

在舞蹈表现中,音乐与舞蹈是一体的。

舞蹈是魔幻的舞台表演艺术。

舞蹈艺术表现受舞台空间限制。

《流浪者之歌》的编导是?

舞蹈编导应具备的文化艺术修养有 。

《时辰之舞》是意大利哪一部经典歌剧的选段?

人类的舞蹈能力是与生俱来的吗?

人类最初通过 语言传递情感。

劳动动作的规律性、反复性、定势性,奠定了舞蹈的动作基础。

人体姿态造型成为舞蹈动作形态所需要的要素,包括 。

“舞”字中间“一横四竖”的象征意义是 。

在古代乐舞文化中, 的舞蹈动律和形态,是民间古人达欢意识的体现,亦构成东方舞蹈中对足下表现的青睐与表达。

舞蹈的形体美是否由胖瘦决定?

挺拔站姿的最关键部位是 。

优美坐姿的最关键部位是 。

“古典舞”最初的提出者是谁?

身韵古典舞与什么表现形式相关?

“小五花”的动势与太极图文化符号有关联。

汉唐古典舞的形成依据是什么?

残疾人艺术团表演的作品《千手观音》,编导是 。

朝舞蹈中常出现的图腾形象是 ?

“空 哒哒 空哒哒丨空 哒哒 空哒丨”是朝舞蹈 节奏型。

朝舞蹈形态表现特征的关键词是围、拧 、 、圆。

蒙古族舞蹈的典型图腾形象是 。

蒙古族舞蹈的主要律动表现特征为:提、 、稳、 、放。

蒙古族音乐中多为固定节奏型。

下列选项中,属于蒙古族舞蹈种类的是 。

芭蕾舞起源于法国。

芭蕾舞具有突出的 和 的特征。

下列哪些是学习芭蕾舞的核心要素?

伊莎多拉·邓肯善于环境即兴表演。

在环境中即兴起舞的创作方式是 。

现代舞蹈家王玫的代表作品是哪部?

街舞起源于哪个?

作品《天山原色》是以下哪种艺术类型?

舞蹈的典型动态特征是什么?

和 是舞蹈手的典型姿态律动。

“纳孜尔库姆”是哪个地区的“赛乃姆”

以下哪个作品属于舞蹈。

下列表现形式中,属于藏族舞蹈的是什么?

下列表述,哪一个是对“卓舞”的正确解读。

作品《哈达献给》的编导是谁?

to spell the past form of the following words when used as verbs, to which one should we first add –k- then -ed?

guests ______ and screamed when the bomb exploded.

of the following words, the underlined part of which one is pronounced differently in american english and in british english?

how is the word schedule pronounced in american english?

the discovery of penicillin, famously, was a happy ______.

they are looking for a happy ______: a house that is not too big but that has lots of storage space.

i wish you many happy ______ of the day.

until his appointment becomes official, ted is keeping a low ______.

a tiger ______ but a wolf ______.

to clean the water bottle which has been used for a long time, white vinegar can be used to remove ______ from the inner surface of the bottle.

the map is drawn to the standard ______ of 1/100,000 so there is not much detail.

nuclear weapons cause destruction on a massive ______.

the sails ______ themselves with wind.

the book is ______. you should have returned it to the library last week.

he had lived illegally in the united states for five years after his visitor's visa ______.

he tried to keep a(n) ______ between work and relaxation.

she ______ her balance and fell.

the cost needs to be balanced ______ its benefits.

the garden is overgrown with ______, so i have to ______ it now.

both parents and children should try to______ the generation gap between them.

monkey king ______ his eyes and looked afar.

what is the meaning of the word sharp in the sentence “there is a sharp contrast between the lives of the poorest and the richest members of society”?

what is the meaning of the word sharp in the sentence “there is a sharp turn on the road ahead”?

what is the meaning of the word sharp in the sentence “she is a very sharp dresser”?

______ and simple clothes are appropriate for school wear.

surely you can see what's wrong; it's as plain as the ______ on your face.

every girl in town admires her for her ______ figure.

look at the lovely ______ cheeks of the baby!

works of art and priceless ______ records were ruthlessly destroyed in the war.

their inventions have contributed to the development of ______ engineering.

we bought a all car for ______ reason.

there is nothing in the world ______ teaches us some lessons.

he is nothing ______ a singer.

i'm not going to _______ his signature for you! what do you take me for?

the term ‘cardboard city’ was ______ to describe communities of homeless people living in cardboard boxes.

determined to live ______ someday, he managed to get trained in iron molding.

the reality star and her boy-friend have officially ended their five month romance. she claimed yesterday that they parted ______.

13. the boxer beat his wife _______ at home and was then caged for life.

every morning she ______ her huand’s shirt before he goes to work.

sure, you convinced mom to stop those boring violin lessons! but that makes it easier for her to send us to sunday school. don't you realize we've jumped out of the frying ______ into the fire?

______ is a unit for measuring length which equals to 10 meters.

a _______ is a cycle with three wheels, two at the back and one at the front or sometimes otherwise. a. monocycle b. bicycle c. tricycle d. car

20. ______ is the state or custom of being married to only one person at a particular time.

the two sides of a coin are known as ‘______’ and ‘tail’.

i've always been good at math—i guess i just have a ______ for numbers.

when the boss learned tom had been lying, he fired him _______ the spot.

i have to set numerous alarms for the morning because i sleep like a _______ every night!

kim is staying for dinner, and he eats like a _______, so you’d better make some extra food.

班固《汉书·艺文志》中“诸子”包括下面哪些学派?

班固《汉书·艺文志》中的“诸子”包括兵家在内。

根据《朱子语类》记载,庄子是战国时期哪个地方的人?

根据司马迁《史记》记载,下面有关庄子的说法,哪些是正确的选项?

“道生一,一生二,二生三,三生万物”是下列诸子中哪一位的观点?

根据《庄子·知北游》一文,庄子曾经跟哪一位讨论“道恶乎在”这一问题?

“庄周梦蝶”寓言出自《庄子》哪篇文章?

“螳螂捕蝉”一语出自《庄子》哪篇文章?

广告学的学科特色

学习广告学的正确态度是

对于广告的生命力,理解正确的是?

关于广告的社会性,理解正确的是

对于广告观的理解,正确的是

通常,我们用下列哪个词来统称广告或广告活动?

现代意义上的“广告”一词是从哪国引入的?

企业为了提高某种产品的知名度,促进这种产品的销售,利用与销售或产品直接有关的表现形式,说服消费者购买产品的这类广告是以下哪种广告?

旨在使受众受情感线索吸引,产生共鸣,进而移情到品牌的广告类型是?

广告隶属于营销组合中哪个部分?

在一般的传播过程中,当信源形成观点以后,会将其编码为讯息,然后通过某种渠道传递给受者即信宿。受者必须将收到的讯息进行______才能理解讯息。

“这辆车有8缸,时速每小时200英里”,该广告语是_______。

______对整个广告传播过程负法律责任,并确定将什么样的信息传播给实际消费者。

找出潜在目标客群的共同行为特征,通过相关网站将广告投放给具有共同行为特征的受众的广告被称作________。

以下媒体中属于自有媒体的是

广告的“原生化”是指

原生广告的核心意图是

下列选项不属于广告对商品供需的影响的是

组织对其拥有差异化优势的选择,以使其在市场上,或是细分市场上进行竞争并得以生存的做法被称作

一个行业中数家最大的厂商(通常为四家或八家)所占市场份额占全部行业市场销售额的比例被称作

下列哪个观点属于市场力量学派

广告产业中重要的三大主体是什么?

我国广告公司的分布现状是?

内容与媒体平台的发展对广告业带来怎样的思考

怎么样理解广告主的变化

数据引发的技术创新对广告业产生了什么影响?

以下哪个不是报纸的特点

以下哪个是杂志的特点

什么可以使广告讯息在地方性市场上得到大面积暴露

以下哪个不是户外广告的特点

以下哪个不是广播广告的特点

以下哪个不是电视广告的特点

以下哪个不是网络环境下受众的特征

cpm指的是哪种数字广告定价方式?

一台直流电动机起动时,励磁回路应该( )。

当直流电机定子与电枢之间的空气隙增大时,直流电机的( )。

某直流电机它的电枢与二个励磁绕组串联和并联,那么该电机为( )电机。

如果直流电机的励磁电流等于电枢电流,则这台电机为( )。

他励直流电动机降低供电电压时,则机械特性硬度( )。

一台他励直流电动机拖动恒转矩负载,当电枢电压降低时,电枢电流和转速将( )。

直流电动机在串电阻调速过程中,若负载转矩不变,则( )。

直流电动机采用降低电源电压的方法起动,其目的是为了( )。

他励直流电动机拖动恒转矩负载进行串电阻调速,设调速前、后的电枢电流分别为i1和i2,那么 ( )。

拖动恒功率负载时,应采用恒功率调速方式,下列直流电动机调试方式属于恒功率调速方式的是 ( )。

如果某三相异步电动机的极数为4,同步转速为1800r/min,那么三相电流的频率为( )。

改变三相异步电动机转向的方法是( )。

三相异步电动机能画出像变压器那样的等效电路是由于( )。

三相异步电动机转子串接电阻的人为机械特性与固有机械特性相比,其( )。

交流电机采用能耗制动,若希望缩短制动时间,可采用的方式为( )。

一台额定运行的三相异步电动机,当电网电压降低10%时,电动机的转速将( )。

在基频以上调速时,频率从往上增高,保持电压不变属于( )。

三相绕线转子异步电动机拖动起重机的主钩,提升重物时电动机运行于正向电动状态,若在转子回路串接三相对称电阻下放重物时,电动机运行状态是( )。

三相异步电动机从基速向下变频调速时,若要调速过程中最大转矩不变,那么在降低频率的同时应使( )。

一台三相绕线式异步电动机拖动起重机主钩,当重物提升到一定高度时需要停在空中,若不使用机械制动措施,可以采用的办法是( )。

三相异步电动机铭牌上标明:“额定电压380/220v,接法丫/△”。当电网电压为380v时,这台三相异步电动机应采用( )。

一台变压器在工作时,有可能使额定电压变化率为零,这时的负载性质可能是( )。

一台单相变压器,如果它的变压比为20,当它正常工作时,副边电流为100a,那么它的原边绕组中的电流应为( )。

变压器空载损耗 ( )。

一台单相变压器,u1n/u2n=220v/110v,二次侧接一个2ω的电阻负载,则从一次侧看,这个负载电阻值是( )。
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