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

Chapter 3 Corrosion and Protection of Metallic Materials 第二三

1、 问题:Metallic materials are mostly ______ i

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