• 2022-06-07
    ‍δ-ferrite is stable only at relatively high temperatures.‍
  • 内容

    • 0

      Modern plastics can ______ very high and very low temperatures.

    • 1

      It is suggested that Mars rock are unlikely be melted even at high temperatures.

    • 2

      Pesticides must be burned at very high temperature because high temperatures can limit ______.

    • 3

      Bonds with relatively high risk of default are called ________

    • 4

      In following temperatures ( ) is not in the range of high, medium and low temperature tempering temperatures of steel. A: 200℃ B: 350℃ C: 400℃ D: 500℃