2021 Explore the Materials——From an Atom to a Device(北京航空航天大学) 最新满分章节测试答案

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本课程起止时间为:2021-05-18到2021-06-30
本篇答案更新状态:已完结

Chapter 1 Materials and Devices： An Introduction 第一章测验

1、 问题:The basic unit of materials is_____, which can bond directly together to form materials, or convert into ions, or assemble into molecules. 
选项：
A:nucleus
B:electron
C:proton 
D:atom
答案: 【atom】

2、 问题:Crystalline structure is a description of the ordered arrangement of atoms, ions or molecules in a crystalline material. We often use ____to illustrate the 3D structure, which is an array of ‘small boxes’ infinitely repeating in three spatial directions.
选项：
A:unit cell
B:crystal lattice
C:grain
D:cuboid
答案: 【crystal lattice】

3、 问题:Atoms could be bonded in different patterns, we call them chemical bonds. The three main types of chemical bonds are metallic, ionic and ______bonds. 
选项：
A:atomic
B:covalent
C:covalence
D:molecular
答案: 【covalent】

4、 问题:According to chemical composition, materials are usually classified as metals, _, polymers and ______. 
选项：
A:alloys
B:ceramics
C:inorganic
D:composites
答案: 【ceramics;
composites】

5、 问题:The sequence of different scales is macro, mini, meso, ______, nano and atomic.
答案: 【micro】
分析：【介观的下一个尺度为微观】

【作业】Chapter 3 Corrosion and Protection of Metallic Materials 作业1

1、 问题:Please find an object made of metallic material in your daily life and write down what kind of metal it’s made of. And explain what kind of method it uses to protect it from corrosion.
评分规则: 【 结合课程相关内容，也可查阅资料作答。
】

Chapter 3 Corrosion and Protection of Metallic Materials 第二三章测验

1、 问题:Metallic materials are mostly ______ in nature.
选项：
A:pure metal
B:amorphous
C:crystalline
D:non-crystalline
答案: 【crystalline】

2、 问题:Based on the 3-dimensional configurations of atoms in crystals, all the crystal lattice structures can be classified as _ crystal systems and ______ Bravais lattice system. 
选项：
A:four, seventeen
B:seven, fourteen
C:four, seven
D:fourteen, seven
答案: 【seven, fourteen】

3、 问题:As indicated in following figure, the crystal plane in the cubic cell could be written as _____.
选项：
A:(011)
B:(110)
C:(101)
D:(111)
答案: 【(110)】

4、 问题:Steel is actually an alloy of _ and ___. 
选项：
A:iron, tin
B:copper, tin
C: iron, carbon
D:iron, copper
答案: 【 iron, carbon】

5、 问题:The majority of metal has a tendency to change into ______ gradually, except several noble metals, due to the exposure to the environment.
选项：
A: alloy
B:metallic compounds
C:grey color
D:metal oxides
答案: 【metallic compounds】

6、 问题:Among various types of corrosions, _corrosion is the most common one. 
选项：
A:electrochemical
B:chemical
C:physical
D:biological
答案: 【electrochemical】

7、 问题:Al foils could keep shining, instead of corrosion. It’s because of____, which forms a very thin layer of oxidized film to inhibit Al for further corrosion.
选项：
A:thermal stability
B:passivation
C:activation
D:corrosion
答案: 【passivation】

8、 问题:Because of the strong bonding, metallic materials usually have high packing density. Typical lattice structures of metals include _, and __ structure. 
选项：
A:body-centered cubic
B:face-centered cubic
C:hexagonal close-paced structure
D:primitive cubic
答案: 【body-centered cubic;
face-centered cubic;
hexagonal close-paced structure】

9、 问题:The standard electrode potential of different metals in an aqueous solution could approximately show their thermodynamic stability.
选项：
A:正确
B:错误
答案: 【正确】
分析：【金属在溶液中的标准电极电位可以反映出金属的热力学稳定性/活泼型。】

10、 问题:The cathodic reaction is probably oxygen reduction reaction (ORR) when steel is corroded in an acid aqueous solution
选项：
A:正确
B:错误
答案: 【错误】
分析：【钢材在酸性溶液中腐蚀时，最可能的阴极反应是H+的还原。在碱性溶液中腐蚀时，最可能的阴极反应是氧气的还原。】

Chapter 5. Polymer Materials 第五章测试

1、 问题: ______is not the polymer material.
选项：
A:Starch
B:Protein
C:Leather
D:Sugar
答案: 【Sugar】

2、 问题:______is the characteristic unit of polymer structure.
选项：
A:Atom
B:Element
C:Group
D:Monomer
答案: 【Monomer】

3、 问题:Choose the characteristics of copolymers from the following options.
选项：
A:Consist of single species of repeating units.
B:Synthesize from addition polymerization.
C:Have two or more types of monomers.
D:Have a complex structure
答案: 【Have two or more types of monomers.;
Have a complex structure】

4、 问题:______are the possible features of polymer materials. 
选项：
A:Long chain
B:Repeat units
C:Mainly inorganic
D:Crystalline
答案: 【Long chain;
Repeat units;
Crystalline】

5、 问题:The components of a species AB in an addition reaction are added to adjacent atoms of a single bond.
选项：
A:正确
B:错误
答案: 【错误】

6、 问题:Crystallization occurs above the Glass transition temperature (Tg) and below the melting temperature (Tm).
选项：
A:正确
B:错误
答案: 【正确】

Chapter 4 Inorganic Non-metallic Materials 第四章测试

1、 问题: ______is not the property of inorganic non-metallic materials.
选项：
A:more complicate crystalline structure than metals
B:no free electrons
C:low melting temperature
D:strong chemical resistance
答案: 【low melting temperature】

2、 问题: Which is not correct?
选项：
A:The ordinary ceramic is not transparent because they are made of ultra pure raw materials.
B: The ordinary ceramic is not transparent because they contain impurities.
C:The ordinary ceramic is not transparent because they contain gas cavity.