The phenomenon of shrinkage and swelling of wood occurs in A: below fiber saturation point. B: above fiber saturation point. C: above or below the fiber saturation point. D: no correlation with fiber saturation point.

Which one has the function of defense and protection A: Matrix B: Collagen fibril C: Collagen fiber D: Elastic fiber E: Reticular fiber

Fruits are a good source of which nutrients? A: Vitamins, carbohydrates, and minerals B: Fats, carbohydrates and fiber C: Minerals, vitamins, and fiber D: Protein, fiber, and vitamins

For fabrication of fiber reinforced composite, in which one weak<br/>interface is desired to ensure the composite possess high toughness.(<br/>) A: Carbon fiber reinforced titanium. B: Carbon fiber reinforced carbon composite. C: Glass fiber reinforced polymer.

It is said that synthetic fiber (合成纤维) is not as good as natural fiber. Natural fiber is said to be __________ synthetic fiber. (superior)

What is the main factor causing Rayleigh scattering? A: Defects equivalent to the wavelength scale of the fiber B: Defects equivalent to the geometric size of the fiber C: Defects equivalent to the length of the fiber D: Impurities

Fiber reinforced polymer mainly refers to composite materials. If carbon fiber is embedded in epoxy resin, the strength of the composite will be increased.

According to , optical fiber movable connectors can be divided into two types: aligning type and non-aligning type. A: Connection method B: Structure C: Optical fiber mutual contact relationship D: Optical fiber type

The following property cannot be attributed to insoluble fiber:

Optical fiber communication refers to: 光纤通信指的是：