题目内容

Which option belongs to the electrical properties of the material?

A. electrical conductivity
B. heat capacity
C. thermal conductivity
D. elastic modulus

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Which options belong to the mechanical properties of the material?

A. stiffness
B. dielectric constant
C. strength
D. toughness

Which options belong to the optical properties of the material?

A. electromagnetic
B. reflectivity
C. index of refraction
D. light radiation

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