21康复人体运动学搜题用什么软件最好-2024欧洲杯竞猜官方平台

会计从业题库 2282

over the years this country seemed to waver unpredictably between love and hatred for the united states, sometimes begging for its attention, sometimes lashing out at it.

on monday night the prime minister faces the biggest challenge at the parliament just as security forces batten down the city center ahead of what they fear will be violent protests on tuesday.

richelieu apartments were ashed apart as if by a gigantic fist, and 26 people perished.

debris flew as the living-room fireplace and its chimney collapsed.

with two walls in their bedroom sanctuary beginning to disintegrate…

several vacationers at the luxurious richelieu apartments there held a hurricane party to watch the storm from their spectacular vantage point.

the wind sounded like the roar of a train passing a few yards away.

household and medical supplies streamed in by plane, train, truck and car.

telephone poles and 20-inch-thick pines cracked like guns as the winds snapped them.

the antagonist in the story is ______________.

the author inserts paragraph 19 and 20 in the story for the purpose of ______________.

currently, there are ________ lists of male and female names in alphabetical order used alternatively for hurricanes.

the ________, or the turning point of a narration, occurs when the conflicts reach the summit, and the most exciting action or highest tension occurs.

“face to face with hurricane camille” describes a series of actions of the koshaks and their friends against the forces of a devastating hurricane in a ________ way.

the distinctive scent of wool and the ______ bleating of sheep filled the air, along with the ell of foreign sweat and unwashed clothes.

i am not a man given to sentiment, as you are doubtless aware, but i must ______ that i was moved by your telephone call yesterday.

the inidual responsible for this ______ crime will be found, charged, and prosecuted to the fullest extent of the law.

the only way to turn things around is to ______ the building and put up a bigger, more valuable one in its place.

... as the fastest train in the world slipped to a stop in hiroshima station. (para. 1)

every day that i escape death, each day of suffering that helps to free me from earthly cares, i make a new little paper bird, and add it to the others. (para. 38)

seldom has a city gained such world renown, and i am proud and happy to welcome you to hiroshima, a town known throughout the world for its -- oysters. (para. 17)

... the tall buildings of the martyred city flashed by... (para. 3)

because, thanks to it, i have the opportunity to improve my character. (para. 38)

world war ii was a global military conflict that took place between ______.

writing features can be more demanding than writing straight news stories because of the following factors except ______.

what is the general tone of the text “hiroshima--the ‘liveliest’ city in japan”?

what is the symbol of the kimono and the miniskirt in the text?

the following are reasons why the atomic victims in hiroshima want to commit in paragraph 34 except______.

1. 他喜欢这些聚会,喜欢与年轻人交往并就各种问题交换意见。(to rub shoulders with) 2. 他陷入沉思之中,没有理会同伴们在谈些什么。(to be oblivious of)

the music reverted to old, familiar favorites. no drums, no guitars, just a piano and a ______ trumpet loping and leaning, ducking and bobbing.

the excited voices of children, however, didn’t need any ______. they came intermittently into town from the river, where they swam and played games, chasing after one another, their school uniforms strewn on the grasses at the riverbank.

if you see comments that you find ______, please use the “flag as inappropriate” feature by hovering over the right side of the post, and pulling down on the arrow that appears.

or do they fear that the people in ______ of designing them are making the wrong choices about how to design them in the first place?

“faculty meeting today... what time?” “the usual time,” she replied. “two?” he asked, wrinkling his nose in ______. “but it’s almost one already.”

as a result the nerves of both the duke and duchess were excessively frayed when the muted buzzer of the outer door eventually sounded. (para. 1)

you drove there in your fancy jaguar and you took a lady friend. (para. 24)

the obese body shook in an appreciative chuckle. (para. 7)

her voice was a whiplash. eyes bored into him. swallowing, sullenly, he complied. (para. 99)

the duchess kept firm tight rein on her racing mind. (para. 75)

how did arthur hailey prepare for his novel hotel?

what crime did the duke commit? was it a serious crime?

what kind of writing blackmail is?

the following are the ways of portraying a character in the story except______.

5. the following are the symbol of the croydons’ luxurious and extravagant life in the text, except ______.

why was there a clash between the fundamentalists and the modernists? because ________________.

why did the american civil liberties union announce that it would take john scopes’ case to the u.s. supreme court? because ______.

the following are the descriptions of john scopes except ______.

the writer used different rhetorical devices to illustrate the case that he was involved in except ______.

the following are the descriptions of the court in the text except ______.

the sky was a ______ yellow, with thick clouds that rolled and boiled as if some giant hand was stirring the sky.

i’m bending to give him a ______ pat when i see what he left on the turkish runner in the hallway.

she says starvation was ______ while she was growing up, and that the family was occasionally given a bag of potatoes by the government.

in the film, angelica’s daughter is eventually able to ______ the loss of her mother through the comfort of the distinct memories (real and imagined) that fill her life with her mom’s influence.

two attack helicopters from a nearby base helped ______ the attack; more than ten guards killed.

bryan, ageing and paunchy, was assisted in his prosecution by his son, also a lawyer, and tennessee’s brilliant young attorney general, tom stewart. (para. 11)

the trial that rocked the world. (title)

“don’t worry, son, we’ll show them a few tricks,” darrow had whispered, throwing a reassuring arm round my shoulder as ... (para. 2)

the christian believes that man came from above. the evolutionist believes that he must come from the below. (para. 20)

... when bigots lighted faggots to burn the men who dared to.... (para. 14)

the rhetorical device used in "when it has taken on the patina of the mills it is the color of an egg long past all hope or caring" in para. 4 is ______.

the word "libido" in the title is from the field of psychoysis.

the sentence "i award this championship only after laborious research and incessant prayer" in para. 5 is sarca.

what images of ugliness have been created in this essay?

... and here was a scene so (1) hideous, so (2) bleak and forlorn that it reduced the whole aspiration of man (3) macabre and depressing joke.

h. l. mencken’s prose is as ______ and his rhetoric as ______.

“the libido for the ugly” is a kind of juvenalian satire, because______.

there are many words and expressions associated with exaggeration except ______.

mental imagery can be metaphorically expressed as ______.

it can start when travelers wipe out while driving in snow and ice; or when hikers in national forests get confused, lost and become ______ as darkness takes over.

there is a hint of a conspiracy at one point, but it's veiled and ______, and it vanishes almost at once.

there was nothing more spectacular than watching the sunrise in the ______ world, the tangible one, from the vantage of the immortal world.

i am the least anti-semitic person that you have ever seen in your entire life. i hate the charge. i find it ______.

it is as if some titanic and aberrant genius, uncompromisingly ______ to man, had devoted all the ingenuity of hell to the making of them.

it is incredible that mere ignorance should have achieved such masterpieces of horror. (para. 6)

the country itself is not uncomely, despite the grime of the endless mills. (para. 3)

... safe in a pullman , i have whirled through the gloomy, godforsaken villages of iowa and kansas, and the malarious tidewater hamlets ofgeorgia. (para. 5)

... a crazy little church just west of jeannette, set like a dormer-window on the side of a bare leprous hill ... (para. 75)

the following are the descriptions about al gore except______.

why did al gore use a variety of writing modes in ships in the desert? because he wanted to ______.

which of the following is not the disturbing images of global warming according to the text?

why does the writer use personification as a kind of technique in his explanation of “ships in the desert”? because he wants to ______.

there are many terms concerning the field of environmental protection in the text except ______.

when we punish criminal offenders differently based on the results of their actions, we seem to violate this deeply held moral ______ that “ought implies can”.

law firms must find ways to recruit and ______ talent and to train and deploy that talent in ways that provide value to their increasingly sophisticated corporate clients.

he may not deliberately exploit interpersonal relations but simply remain willfully ______ to normal expectations.

we were anchored in what used to be the most productive fishing site in all of central asia, but as i looked out over the bow, the prospects of a good catch looked bleak. (para. 1)

now it is disappearing because the water that used to feed it has been erted in an ill-considered irrigation scheme to grow cotton in the desert. (para. 1)

... which means we are silencing thousands of songs we have never even heard (para. 6)

but one doesn’t have to travel around the world to witness humankind’s assault on the earth. (para. 7)

...but in the air above every country, above antarctica, above the north pole and the pacific ocean – all the way from the surface of the earth to the top of the sky. (para. 13)

winston s. churchill was awarded the nobel prize in _______________ in 1953.

hitler invaded __________ as a military power on june 22, 1940.

the cause of any russian fighting for his hearth and _____________ is the cause of free men and free peoples in every quarter of the globe.

nazi regime excels all forms of human wickedness in the ____________ of its cruelty and ferocious aggression.

the nazi régime is devoid of all theme and principle except appetite and racial domination.

i suppose that they will be rounded _______ in hordes.

churchill will unsay no word that he has spoken about it.

hitler was counting _______ enlisting capitalist and right wing sympathies in the uk and the usa.

the great dominions will in _______ course concur.

life is the lust of a lamp for the light.

you want your pound of flesh, don’t you?

reading maketh a full man; conference a ready man; and writing an exact man.

o dear! o dear! what shall i do? i have lost my beau and lipstick too.

eat our corn, you’ll ile from ear to ear.

in new york city the steamship “quaker city” prepared to sail on a pleasure cruise to europe and the holy land.

the geographic core, in twain’s early years, was the great valley of …

his popularity is attested by the fact that more than a score of his books remain in print, and translations are still read around the world.

for eight months he flirted with the colossal wealth available to the lucky and the persistent, and was rebuffed.

twain found the ultimate expression of escape from the pace he lived by and often deplored, from life’s regularities and the energy-sapping clamor for success.

mark twain honed and experimented with his new writing muscles, but he had to leave the city for a while because of some scathing columns he wrote.

from them all mark twain gained a keen perception of the human race, of the difference between what people claim to be and what they really are.

he tried soldiering for two weeks with a motley band of confederate guerrillas who diligently avoided contact with the enemy.

...but for making money, his pen would prove mightier than his pickax.

he commented with a crushing sense of despair on man’s final release from earthly struggles.

the american local color writers include the following except _______.

a feature article differs from a biography by focusing on ______.

the author considers mark twain as the mirror of america because of mark t wain’s erse identities except a _______.

what is the tone of the text?

what is the rhetoric device used in the sentence “steamboat decks teemed not only with the main current of pioneering humanity, but its flotsam of hustlers, gamblers, and thugs as well”?

it excels all forms of human wickedness in the efficiency of its cruelty and ferocious aggression.

i was just about to make my little bow of assent, when the meaning of these last words sank in, jolting me out of my sad reverie.

her eyes were riveted on his face, her handsome, high-cheekboned features set in their most imperious mold.

place oil in a heavy-bottomed pan, add onions, and cook them over a medium flame, stirring often, until they turn ______.

past experience has shown that undergraduates will only apply themselves to subjects which they perceive as relevant to their future careers.

i have seen george wringing his hands after such a rebuff, and i am sure the annoyance and terror he lived in must have greatly hastened his early and unhappy death.

this week, the air force issued a 25-page report trying to debunk the story that an alien spaceship crash landed in roswell, new mexico.

the more we reuse and recycle, the fewer resources we deplete, including fuel to transport the goods.

the bbc has unrivalled resources to deploy: the expertise of our correspondents around the world, and the experience and quality of the world service.

the case had erupted ______ my head not long after i arrived in dayton as science master and football coach at the secondary school.

his poor health ______ him to resign from his job.

the city is ______ of three sections, which are separated by rivers.

the economy in this city was ______ by the new investment from abroad.

there used to be an old city here, which was ______under the river about 2,000 years ago.

the human-rights campaigner managed to achieve some international renown after decades of hard work.

two high points of color appeared in the _____ duchess of croydon's cheeks.

to everyone's relief, the jury soon returned with a guilty ____.

problems like acid rain and large oil spills are basically “___” environmental threats.

he was ______ in his decision to give up oking.

the leader's speech in defense of the policy didn't carry much ________.

why do we spend so much time on _____ decisions, like whether the cola should be diet or not?

at last she ____ to the request of the publishers to write another book.

some prices are preposterously high.

_____ political views by different parties are capable of causing grave situations in this country.

when you were playing for the highest stakes, you made the highest bid.

from them all mark twain gained a keen perception of the difference between what people claim to be and what they really are.

the nazi regime is devoid of all theme and principle except appetite and racial domination.

i feel sure it is a decision in which the great dominions will in due course concur.

his first novel has been taken as the manifesto of his generation in defiance of some of the current establishments.

a man celebrated his 100th birthday with 25,000 pounds in winnings on tuesday after he beat the bookmakers with a ____ that he would live for a century.

if you ask energy firms what their biggest obstacle will be in 2019, most ____ their reduced access to capital.

it did not make me feel melancholy — that this sky had been there before i was born and would still be there when i was dead.

the government has ____ them permission to leave the country.

critical moments like these are to the sports fan what the beautiful lines of a poem are to an avid reader.

the fundamental tenet of ______ is spiritual freedom.

share prices plummet on the news of the devaluation.

mary is very set in her ways, while her brother has a more ____ attitude to life.

he ____ the paragraph into one line.

never has a scholarly work of this ____ been attacked with such unbridled fury and contempt.

the spirit of carnival was soon dissipated once the eager young men had a good taste of the reality.

the large crowd of troops were advancing_____ because the area had been mined by the enemy.

a large number of people listened with open-mouthed astonishment while the breaking news sank in.

this renowned professor said that everyone should turn their backs_____ a craving for fame and prestige.

a world will lament them a day and forget them forever.

he went west by stagecoach and succumbed to the epidemic of gold and silver fever in nevada.

his career was cut short when he succumbed to cancer.

the saxon peasants tilled the land and reared the animals.

her own tension was not lessened by the knowledge that both might return at any moment.

he commented with a crushing sense of despair on man's final release from earthly struggles.

but since the country was blind and deaf to everything save the glint and ring of the dollar…

the crowd seemed to feel that their champion had not scorched the infidels with the hot breath of his oratory as he should have.

there was not a single decent house within eye range from the pitturgh to the greenurg yards. there was not one that was not misshapen, and there was not one that was not shabby.

… is the very symbol of the incessant struggle between the kimono and the miniskirt.

we were partners, not soul mates, two separate people who happened to be sharing a menu and a life.

peggotty rubs everything that can be rubbed, until it shines, like her own honest forehead, with perpetual friction.

the children went from to like buckets in a fire brigade.

this way i look at them and congratulate myself on the good fortune that my illness has brought me.

the country itself is not uncomely, despite the grime of the endless mills.

bitterness fed on the man who had made the world laugh.

he tried soldiering for two weeks with a motley band of confederate guerrillas who diligently avoided contact with the enemy.

from them all mark twain gained a keen perception of the human race, of the difference between what people claim to be and what they really are.

...who saw clearly ahead a black wall of night.

the russian danger is our danger, and the danger of the united states…

it excels all forms of human wickedness in the efficiency of its cruelty and ferocious aggression.

we were anchored in what used to be the most productive fishing site in all of central asia, but as i looked out over the bow, the prospects of a good catch looked bleak.

the storm of abuse in the popular press that greeted the appearance of the third international is a curious phenomenon.

the girl had a painful pleasure when she saw her boyfriend.

a sharp rattle was heard on the window, which made the children jump.

we must all hang together, or we shall hang separately.

one has to be cruel to be kind.

from out of the forest rushed a tiger.

not without effort he made this discovery.

the country itself is not uncomely, despite the grime of the endless mills.

united there is little we cannot do in a host of co-operative ventures. divided, there is little we can do.

several vacationers at the luxurious richelieu apartments there held a hurricane party to watch the storm from their spectacular vantage point.

here was boast and pride of the richest and grandest nation ever seen on earth.

some people go to priests; others to poetry; i to my friends.

great green-and-yellow grasshoppers are everywhere in the gall grass...

war is peace. freedom is slavery. ignorance is strength.

i am proud to welcome you to hiroshima, a town known throughout the world for its─oyster.

he closed his busy life at the age of sixty.

knowledge makes humble; ignorance makes proud.

but the essence of that ugliness is the thing which will always make it beautiful.

“don't worry, son, we'll show them a few tricks,” darrow had whispered throwing a reassuring arm round my shoulder as we were waiting for the court to open.

the duchess of croydon kept firm, tight rein on her racing mind.

but in westmoreland they prefer that uremic yellow, and so they have the most loathsome towns and villages ever seen by mortal eye.

he went west by stagecoach and succumbed to the epidemic of gold and silver fever in nevada’s washoe region.

the crowd punctuated his defiant replies with fervent “amens”.

we were partners, not soul mates, two separate people who happened to be sharing a menu and a life.

i wish that both your wishes were true, and that you might both die of heart-disease the moment after you had made your wills in my favor.

lumber, corn, tobacco, wheat, and furs moved downstream to the delta country.

the high-speed railway alignment is

the functions of superelevation for outer line include:

the control factors which limit the curve radius of high-speed railway are

the main factors which affect the pressure wave when two high-speed trains meet:

which option is not a rail function?

which of the following track structures is to embed sleepers in the cast-in-place track bed slab

what are the advantages of ballasted track compared with ballastless track

the basic process of track buckling does not include

the main factors affecting the stability of cwr are

turnout number in china refers to

which of the following is not a feature of a high-speed turnout

please describe the features of high-speed railway system.

逻辑式a b(c d)的对偶式是()

属于组合逻辑电路的部件是()

逻辑式a(a b)(a b c)(a b c d)=()

下列电路中能够把串行数据变成并行数据的电路应该是()

ttl电路使用的电源电压vcc=()

l=ab c的对偶式为:()

n级触发器构成的环形计数器,计数模是()

幅度为vm的矩形脉冲的上升沿时间tr是指从()上升到()之间的时间间隔。

逻辑代数的三种基本运算是()

相同逻辑功能的ttl电路和cmos电路相比,前者功耗大。()

某门电路对正逻辑而言是与非门,对负逻辑而言则是或非门。()

扭环形计数器都是不能自启动的。()

(1000)8421bcd表示十进制数10。()

若a b=a c,则一定是b=c。()

一个十进制计数器,可以作为十分频器使用。()

因为d触发器的特性方程是qn 1=d,所以任何时候均有q=d。()

树木引种成功的标准是什么?

对arm-cortex系列处理器来说,错误的说法是

嵌入式系统分为微控制器与应用处理器两大类,这样表述是否正确?

微处理器mcu的英文全称为microcontroller,多媒体应用处理器map的英文全称为multimedia application processor,这样说法是否正确?

简要阐述嵌入式系统的基本含义

简要阐述嵌入式系统的由来、特点及分类

简要阐述mcu的基本含义,以及mcu出现前后测控系统设计方法发生的重要变化

下面哪一模块可以将数字信号专为模拟信号?

gpio即是通用输入输出引脚,mcu可读取该引脚的值,也可以向该引脚写值。

说说什么是rtos,你所了解的rtos有哪些?有什么特点?

下面选项中,哪一项说法是正确的?

分析下面程序实现的功能int func(int data) { int count=0; while(data != 0) { data &= data -1; count ; } return count; }

可以说arm cortex-m0 是:

字节存储顺序(endianess)分为小端格式(little endian)和大端格式(big endian),小端格式的含义是:

" "伪运算是在程序编译期间完成的

arm cortex-m0 中调用子程序是用bl指令,不是用b指令。

arm cortex-m0内部寄存器有:

arm cortex-m0 内部的应用程序状态寄存器apsr主要包含的关键位有:

kl系列的一个具体mcu型号标识含有:

mcu的片内flash主要功能是:

在滤波电路中,相对于大电容来说,小电容滤高频杂波。

mcu硬件最小系统一般由电源、晶振、复位、写入器接口电路等四个部分构成。

mcu硬件最小系统的基本含义是:

所学mcu芯片每个引脚均有一个引脚控制寄存器,该寄存器的第10-8位(mux字段)的功能是()

利用gpio引脚控制led小灯时,一定是高电平led小灯亮,低电平led小灯灭。

请根据教材4.2.1节知识,已知端口porta的引脚控制寄存器的基地址为0x4004_9000,那么portc口4号引脚的引脚控制寄存器地址是( )

下面不是嵌入式调试手段的是()

单步调试中,我们可以了解程序运行时的哪些状态?

单步调试可以应用于嵌入式系统程序中断调试。

在工程中含有较多中断和通信的情况下,出现跑飞现象,应该采用( )调试方法?

无操作系统下,关于嵌入式程序运行路线,下面描述正确的是:( )

构件的设计应满足()

底层构件的封装是多余的,编程时直接操作底层寄存器就可以了。

简要分析gpio_set函数的封装要点。

指令“push {r0-r3}”的作用是什么?

汇编中子程序的概念和c语言函数的概念相似。

汇编“mov r0,#0” 和“movs r0,#0”的区别是什么?

汇编语言中,参数传递通常使用哪些寄存器?

公共要素文件中,一般应包括以下几个方面的内容:

在底层驱动构件中,可以根据需要适当使用全局变量。

设计中间构件时,如何描述需求接口及供给接口?

以下关于波特率的描述中错误的是:

rs232采用负逻辑,-10v~-3v为逻辑“1”, 3v~ 10v为逻辑“0”。

从知识要素角度,uart驱动构件的基本函数应包括:

m0 中断结构包括:

如果同时有多个中断信号到来,nvic根据设定好的中断优先级进行判断;如果优先级完全相同的多个中断源同时请求,则先响应irq号较大的。

uart初始化函数至少包括哪几个参数?

一般使用状态寄存器的rdrf位与控制寄存器的rie位搭配使用来完成串口数据的读取。

请给出uartx模块sbr字段(0-12位)br位值的计算公式。

请解释临界区的概念。

关于嵌入式软件开发的说确的是?

请归纳总结下 上位机通过串口与下位机通信的编程步骤

systick定时器可以实现的功能是( )

在arm cortex-m0 中,所有内核异常的优先级都可以手动设置。

systick定时器的寄存器有( )、( )、( )和校准寄存器。

脉宽调制的分辨率取决于( )

脉宽调制的主要技术指标包括( )

一般情况下,mcu实现的pwm波的脉冲宽度的增加与减少可以连续变化。

假设定时器的频率是48mhz,实现2μs的高电平持续时间需要的时钟周期个数是( )

下面哪种时钟源可以用于pit?

lptmr的时钟源可以是:

lptmr的计数器采用增1计数方式。

rtc模块包含两个中断向量号,秒中断的中断向量号为( ),其他中断对应的中断向量号为( )。

4×5键盘可以安排( )个按键。

一般情况下,可以正确获得键值的常用键盘扫描方式有

键盘驱动构件只适用于kl25、kl26系列mcu。

5×5键盘的键值至少要用( )个字节表示。

五连排共阴极8段数码管共有( )根线需要连接到mcu

实际应用中,有8个8段数码管,就必须由64根数据线来控制数码管的亮暗

n连排数码管也称动态扫描数码管,我们看到整排数码管同时显示数字是由于( )造成的现象

下面关于hd44780编程结构的描述中正确的是:

hd44780模块的e引脚信号在下降沿时才将数据真正写入到lcd模块中,因此需保证e引脚在产生下降沿时数据已经被送至总线上,否则会无常显示。

lcd构件入口参数是:

flash驱动构件中,写入操作包括以下哪几个参数:

用本章给出的加密方法对芯片加密后,通过外部调试接口只能进行整体擦除操作,而无法执行访问flash的指令。

写入器编程模式和flash在线编程模式的区别:

下面关于flash驱动构件描述正确的有:

写入函数与擦除函数类似,主要区别在于,擦除操作向目标地址中写0xff,而写入操作需要写入指定数据。

kl系列mcu提供了哪些flash在线编程的寄存器?

下面关于kl25的adc模块描述正确的有:

为了使采样的数据更准确,必须对采样的数据进行物理量回归。

adc模块的初始化需要哪些参数?

cmp驱动构件的功能函数有:

利用简单电压比较器可将正弦波变为同频率的方波或矩形波。

dac转换器的功能是:

对于常压下沸点较高或热敏性物系的分离,宜采用( )。

蒸馏分离的特点为( )。

对于甲醇-水二元物系的精馏分离过程,其中的甲醇为重组分,水为轻组分。

在一定的压力下,对于苯-甲苯二元物系,随着苯的含量升高,溶液的泡点温度( )。

在二元理想物系的x –y平衡相图中,平衡线与对角线之间的距离越大,则( )。

汽液两相呈平衡状态时,汽液两相温度相同,汽相组成大于液相组成。

对于二元理想物系,其相对挥发度可表示为( )。

关于相对挥发度α,下列说确的是( )。

泡点方程表示当汽液两相平衡时,汽相组成与平衡温度间的关系。

平衡蒸馏装置应包括( )。

在平衡蒸馏中,汽液两相的组成关系应同时满足平衡方程与物料衡算方程。

简单蒸馏适用于( )。

因为简单蒸馏为单级过程,故此简单蒸馏的物料衡算应该进行微分衡算。

间歇精馏与简单蒸馏的本质区别是( )。

对于精馏塔内从塔顶向下的n-1、n、n 1相邻3层塔板,以下关系式成立的是( )。

在精馏塔进料板以上的塔段,上升汽相中易挥发组分向液相中传递,最终实现了上升汽相的精制,故此称为精馏段。

下列计算内容属于精馏过程操作型计算的是( )。

理论板假定成立的条件是( )。

根据恒摩尔流假定,精馏段内上升的汽相摩尔流量与提馏段内上升的汽相摩尔流量相等。

某精馏塔的精馏段操作线方程为,则操作回流比为( )。

在下列物料衡算关系式中,表达正确的是( )。

根据恒摩尔流假定,精馏段操作线方程为一直线方程。

对于饱和液体(泡点)进料,下列关系式中表达正确的是( )。

对于汽液混合物进料,进料热状况参数为( )。

对于饱和蒸汽(露点)进料,下列关系式中表达正确的是( )。

进料热状况参数对精馏段操作线方程和提馏段操作线方程均有影响。

在理论板的逐板计算中,需要采用的方程包括( )。

在再沸器内料液受热后部分汽化,故此,再沸器相当于一层理论板。

对于饱和蒸汽(露点)进料,进料线(q线)的斜率为( )。

在理论板的梯级图解中,下列各线交于图中d 点的是( )。

进料温度越高,q值越大,平衡线与操作线距离越近,所需的理论板层数越多。

回流比增大,完成一定的分离任务所需的理论板层数( )。

全回流的特征是( )。

分离任务一定,回流比增大,操作费用( )。

最小回流比可采用作图法和解析法计算,解析法适用于( )。

采用直接蒸汽加热时,提馏段操作线与横轴的交点坐标为( )。

采用直接蒸汽加热应满足下列情况( )。

分离浓度不同的原料液,可在不同塔板位置上设置相应进料口。

某精馏塔中装有20层塔板,塔板间距为0.45m,则该精馏塔的有效高度为( )。

塔板效率具有下列不同的表达形式( )。

等板高度是指分离效果与理论板的作用相当的填料层高度。

某精馏过程的操作回流比为2,塔顶馏出液的流量为15kmol/h,操作条件下物系的汽化潜热为35 kj/kmol,则冷凝器的热负荷为( )。

精馏过程的节能途径包括( )。

对再沸器进行热量衡算时热损失可以忽略。

对于馏出液组成恒定的间歇精馏过程,随着精馏时间的增加,回流比( )。

间歇精馏具有以下特点( )。

对于恒回流比的间歇精馏过程,各个瞬间的操作线彼此平行。

某间歇精馏过程每批操作的汽化量为90kmol,测得汽化速率为25kmol/h,辅助时间(包括加料、预热等)为1.5 h,则每批操作的周期为( )。

对于萃取精馏过程,随着萃取剂加入量的增大,原有组分间的相对挥发度( )。

对于恒沸精馏过程,选择夹带剂的主要原则是( )。

萃取精馏常用于具有最低恒沸点溶液的分离。
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