試題詳解

1. A material is at an equilibrium condition at which its alpha and beta phases exist simultaneously. Which of the following must be true about this material?
(A) This material has only two phases； alpha and beta.
(B) Alpha and beta phases are equally thermodynamically favorable.
(C) Alpha phase is more thermodynamically favorable than the beta phase.
(D) The material is transitioning from alpha phase to beta phase.