举一反三
- The stratification of parent material (heterogeneous parent material) has a more complex influence on the material migration and soil fertility, compared with homogeneous parent material. The stratification of parent material will be inherited to soil.
- The main raw material of wood-based panels is wood or no-wood plant fiber material.
- Which of the following statements are correct? A: The greater the modulus, the stiffer the material. B: The stiffer the material, the higher the resistance of the material to deformation. C: The higher the magnitude of elastic modulus, the higher the magnitude of the inter-atomic bonding forces in a material. D: The higher the magnitude of elastic modulus, the lower the magnitude of the intermolecular bonding forces in a material.
- A ferromagnetic material, which is hard to magnetize and demagnetize, could be used as a computer memory material.
- Most composite materials consist of a selected or reinforcing material and a compatible resin to obtain the specific characteristics and properties desired.
内容
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( ) is not true A: particles of a hard and stiff material added to a ductile matrix increase its ductility and stiffness B: plywood is a laminated composite C: laminated composite was used in aerospace structure D: Diameters of fiber used in composite are in the range of 1μm to 100μm.
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The following is the summary of the reading material with some words missing. Please fill in the blanks with words from the reading material.
- 2
以下哪个是增强技术遵循的准则? A: Restricting and hindering dislocation motion renders a material harder and stronger. B: Restricting and hindering dislocation motion decreases the hardness of a material. C: Restricting and hindering dislocation motion are not related to the hardness of a material. D: Restricting and hindering dislocation motion are not related to the toughness of a material.
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以下哪个是增强技术遵循的准则? A: Restricting and hindering dislocation motion renders a material harder and stronger. B: Restricting and hindering dislocation motion decreases the hardness of a material. C: Restricting and hindering dislocation motion are not related to the hardness of a material. D: Restricting and hindering dislocation motion are not related to the toughness of a material.
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In summarizing a listening material through mind mapping, we may combine different types of mind maps to illustrate different relationships among different key information in the material. （ ）