Structural elements that can be viewed with the naked eye are termed microscopic.
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Generally, the performance of a material is independent of its shape and size.
A. 对
B. 错
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。
A. 75、50
B. 50、75
C. 75、150
D. 150、75
屏蔽双绞线(STP)具有抗电磁干扰能力强、传输质量高等优点。它也存在接地要求高、安装复杂、成本高的缺点。
A. 对
B. 错