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Please according to the content of the document provided above, complete the following blanks.Automobiles would not have been possible without the availability of ( ) or some other comparable substitute. In our contemporary era, sophisticated ( ) rely on components that are made from what are called ( ).
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Please according to the content of the document provided above, complete the following blanks.Virtually all important properties of solid materials may be grouped into six different categories: （ ）, （ ）, thermal, magnetic, （ ）, and deteriorative.
Structural elements that can be viewed with the naked eye are termed microscopic.
Generally, the performance of a material is independent of its shape and size.
同轴电缆有两种基本类型:基带同轴电缆和宽带同轴电缆，它们的线间特性阻抗分别为________Ω和________Ω。
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