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Fillin the blanks with the words given below alkanes, alkenes, amorphous, allotropic, crystalline,

Fillin the blanks with the words given below

alkanes, alkenes, amorphous, allotropic, crystalline, interstitial, interstitialcy, Mohs test, polymorphic, Scleroscope (HSc) test, substitutional, torsional yield strength, ultimate torsional strength, vacancy.

提问人:网友anonymity 发布时间:2022-01-06
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第1题
The density of a crystalline polymer will be greater than an amorphous one of the same material and molecular weight because:

A、the degree of crystallinity of a polymer depends on the rate of cooling during solidification

B、the chains are more closely packed together for the crystalline structure.

C、the degree of crystallinity of a polymer depends on the chain configuration.

D、None the above

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第2题
use appropriate verbal and non-verbal behavior, languages, and strategies 5) ____________________
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第3题
Fill in the gaps with words or phrases given below:The number of visitors from parts of Scotland not including the Edinburgh area was, in fact, relatively small () __________.
A.by a small margin

B.closed up

C.paste

D.wandered

E.threatens

F.civilize

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第4题
Paraphrase: Choose the choice that best explains the meaning of the original sentence. It would be difficult to overpraise this book.

A、This is a difficult book.

B、It is difficult not to overpraise this book.

C、This book deserves much praise.

D、It is difficult to praise this book.

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第5题

Read the following letter and choose the correct answer from the four choices. Dear Manager, Much to my regret, I write this letter to place a complaint against your bad delivery service of your company.The Samsung tape recorder model number JB/4703 that I ordered from your company on Nov. 1, arrived yesterday. The serial number of the machine is 4703 -0641. I am sorry to report that the recorder has been badly damaged. There was no unusual damage to the packing case, but when I opened it, I found that the lid of the recorder had been cracked(破裂)and that the front surface of the machine had been scratched(刮擦). Since there was such damage to the goods, I decided to file a complaint against the delivery service. Would you please let me know whether I should return the recorder to you for a replacement or if you have an authorized service representative here to which I should take it? I will hold on to this recorder until I hear from you. Sincerely yours Jonathan Edward The letter above is a letter of ______________________.

A、apology

B、invitation

C、complaint

D、thank-you

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第6题
What factor in materials selection usually dominates the final choice?

A) Propertiesofmaterials

B) Availability

C) Processibility

D) Cost

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第7题
Which term describes well-defined methods for solving specific problems, such as those used to develop an approach to materials selection?

A) JIT

B) Design

C) Algorithm

D) CIM

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第8题
Which is not an obstacle to acceptance ofnew engineering materials and processes?

A) Time-consuming approach to gain sufficient experience

B) Concern for keeping up with one's competition

C) Lack ofexperience by designers and fabricators

D) Need for compromise between favorable properties and cost

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第9题
Among the following properties, temperatures have the greatest effect on ______.

A) ductility

B) impactstrength

C) hardness

D) strength

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第10题
______ is the maximum stress that can be sustained for a specified number of stress cycles without fracture.

A) Fatiguelimit

B) Fatigueratio

C) Fatiguestrength

D) Enduranceratio

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