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181301
Cu的滑移系虽然比Fe少,但Cu的晶格阻力低,位错容易运动,所以Cu的塑性优于Fe。
181302
金属材料常见的塑性变形方式主要为滑移和孪生。
181303
将金属进行塑性变形,会引起如下性能的变化,其中正确的是()
181304
在什么条件下材料会以孪生方式发生塑性变形?
181305
对于冷成形用材料而言,总是希望获得尽量大的均匀塑形变形量,从这个角度来说此时材料的加工硬化指数就应该()。
181306
银纹是()在变形过程中产生的一种常见缺陷。
181307
非晶态玻璃材料,其永久变形是通过()来进行的。
181308
以下材料强化手段中,能提高材料屈服强度同时不降低材料塑性的方法为()
181309
弹性比功又称为弹性比能或应变比能,是材料在()变形过程中吸收变形功的能力。
181310
弹性比功又称为弹性比能或应变比能,是材料在弹性变形过程中吸收变形功的能力。
181311
Cr13系列钢可用于制造汽轮机叶片材料,一方面是其耐热强度高,另一方面是因为其循环韧性大,消振性好。
181312
对于第二相强化的材料而言,长形的第二相比球形的第二相与位错交割的概率高,对位错的阻碍作用大,强化效果好。
181313
对于固溶体合金而言,合金化对弹性模量的影响会很大。
181314
对于单晶体材料而言,原子排列最密的晶向上测得的弹性模量最大。
181315
材料的刚度越大,则在相同应力下产生的弹性变形量越小。
181316
选择空间飞行器用的材料,为了既保证结构的刚度,又要求有较轻的质量,就要使用比弹性模量这一力学性能指标来评价材料。
181317
材料的弹性模量越大,则在相同拉应力下产生的弹性变形量越小。
181318
下列属于材料的非理想弹性行为的是?
181319
欲提高材料的弹性比功,有两种途径,即()和()。
181320
对于金属材料而言,消除包申格效应的方法有:
181321
下列因素中会影响到材料滞弹性大小的因素有:
181322
对于陶瓷材料而言,压缩弹性模量往往()拉伸弹性模量。
181323
实际工程多晶材料的弹性后效随着组织不均匀性(含结晶学上的不均匀性)的增大而加剧,纯金属的镁、铁、铜、银相比,()的弹性后效最明显。
181324
材料组织越不均匀,滞弹性越明显。经淬火或塑性变形后,滞弹性倾向()。
181325
生产上为了降低机械噪声,对有些机件应选用()高的材料制造,以保证机器稳定运转。
181326
对于陶瓷材料而言,其弹性模量随着气孔率的上升而()。
181327
零件的刚度,表征了具体零件对弹性变形的抗力。要提高零件的刚度,不仅要选用弹性模量高的材料,还可以通过()来提高。
181328
用于制造弹簧的材料必须要有
181329
材料在变形过程的总工程应变等于各个阶段工程应变之和。
181330
真应力有可能小于工程应力。
181331
真应变总是小于工程应变。
181332
真应变不一定小于工程应变。
181333
拉伸力-伸长量曲线和工程应力-应变曲线,形状相似,但两者横坐标和纵坐标的单位不同。
181334
下列材料中,其拉伸应力-应变曲线只有弹性变形阶段而不发生塑性变形的是:
181335
对于退火低碳钢而言,材料拉伸断裂前所能承受的最大应力,称为
181336
根据退火低碳钢的拉伸应力应变曲线,在其弹性阶段可以获得的力学性能指标有:
181337
Literal translation is sometimes called “word-for-word” translation or sentence-by-sentence translation.
181338
If a culture tends to maintain close body distance, usually that culture will have more body contact and body touch.
181339
In Latin American and the Caribbean, to avoid eye contact is a sign of respect.
181340
In Thailand, touching a person’s head is considered rude.
181341
Japanese tend to have closer body distance than Latinos
181342
In a polychronic culture, people emphasize being ‘on time, on schedule’ and doing one thing at a time.
181343
You are using a hammer, but you accidentally hit your own fingers, you might say
181344
You are giving a presentation, but you clicked the wrong button and closed the Powerpoint slides, you would probably say
181345
Which of the following cultures might be the most punctual?
181346
Which of the following does not belong to body language?
181347
This is()the shenzhou V Spaceship landed.
181348
Information has been put forward()more middle school graduates will be admitted into universities.
181349
Energy is()makes thing work..
181350
The manager came over and asked the customer how()
181351
()he does has nothing to do with me.
181352
Many people are still in()habit of writing silly things in()public places.
181353
Alexander Graham Bell invented()telephone in 1876.
181354
Beyond()stars the astronaut saw nothing but()space.
181355
When Linda was a child, her mother always let her have()bed.
181356
Please choose the best translation into Chinese for “All suggestions are welcome. ”
181357
A memo requires immediate attention.
181358
They()wheat to Russia and import silk from Japan.
181359
The battery I bought is of the wrong size—I wonder if the shop will()it.
181360
First he()painting birds and later in writing about them.
181361
May I take this()to thank you all for coming?
181362
The talks will be attended by all().
181363
A(n)()charge is made for heavy baggage.
181364
The judge’s son hopes to enter the()profession.
181365
The price increases were passed on by the firm to the().
181366
Everyone in the class is expected to()in these discussions.
181367
A win-win situation means that both the country and its consumers can benefit from international trade.
181368
According to comparative advantage, people should specialize in what they do best and then trade their products for the things they need.
181369
If a country specializes in what it produces best, it would make fewer profits because it loses the opportunity to sell other goods.()
181370
A country has the opportunity to make more profits if it decreases wages for the work force and investment in plants and equipment.
181371
Trading often takes place in our daily life.
181372
Foreignization actually is not a kind of transplantation, but a kind of translation.
181373
An Advertising Director’s main job is to play an intermediate role between the producer and retailer.
181374
Target audience is the group of people you want attention from: In advertising, it’s the very people who you want to sell your product to.
181375
Sometimes, different cultures can still share very similar values and practices.
181376
Moon cakes does not play an important role in maintaining guanxi during the Moon Festival. It is only a traditional sanck.
181377
The moon cake is a modern invention; our ancestors never had moon cakes.
181378
Traditional festival celebrations often provide business opportunities since people usually tend to spend more on the holidays, especially for products like the moon cake.
181379
Reebok’s Incubus shoe advertising campaign was a huge success because of its creative idea.
181380
Making a point means trying to convince someone with what they usually don’t believe in.
181381
In the same cultural context, misuse of symbols and languages will not create misunderstanding.
181382
The police()(正在寻找) the lost child.
181383
Not only the children but also their father()(object) to the plan.
181384
More than 80 percent of the population()(be) farmers in that country.
181385
Neither of the two brothers()(居住) with their parents.
181386
Fill in the blanks.1. Everyone except Peter and Linda()(be) there when the accident happened.
181387
Simple words and expressions are good enough for product catalogs.
181388
Product catalogs are helpful for both buyers and sellers.
181389
Her new office is()in the center of the town.
181390
The workman()a piece of metal by hammering it.
181391
Their new job is to()toys in a factory.
181392
Passing the English examination should()the chances of getting the scholarship.
181393
She had never imagined being able to visit such()countries.
181394
He usually starts with a()in the design period.
181395
They are making a new()to solve the problem.
181396
The factory met its production()ahead of schedule.
181397
For Tom, the fear of visiting the dentist()the pain of a toothache.
181398
The heritage of Starbucks refers to the Italian coffee tradition.
181399
Starbucks tries to give its customers a special experience.
181400
The word“connection”means a feeling of having something in common.
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