Heating the cold-worked metal progresses in three stages: A: recrystallization, recovery, grain growth B: recovery, recrystallization, grain growth C: recovery, crystallization, recrystallization D: recovery, crystallization, grain growth

The wrong statement about the ultrasonic manifestations of gout is ( ) A: high sensitivity to synovial crystallization B: tophi stone has high specificity C: high specificity of bone erosion D: low sensitivity to bone erosion