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 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.
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.
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.
A ferromagnetic material, which is hard to magnetize and demagnetize, could be used as a computer memory material.
The following is the summary of the reading material with some words missing. Please fill in the blanks with words from the reading material.
The following is the summary of the reading material with some words missing. Please fill in the blanks with words from the reading material.
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.
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.
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.
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.
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. （ ）
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. （ ）
Define a composite material. Give an example of a composite material.
Define a composite material. Give an example of a composite material.
Which of the following shows the right order of adjectives before a noun？ A: It was made of a strange, green, metallic material. B: It was made of a green, strange, metallic material. C: It was made of a metallic, strange, green material. D: It was made of a metallic, green, strange material.
Which of the following shows the right order of adjectives before a noun？ A: It was made of a strange, green, metallic material. B: It was made of a green, strange, metallic material. C: It was made of a metallic, strange, green material. D: It was made of a metallic, green, strange material.