钢液在浇铸过程中结晶凝固成钢锭是钢液冷却到（）以下才开始进行的。
参考答案：结晶温度
Mr. Li Kunming. He the city three times. This time he Kunming for three days.
A. has been to ,have gone to ,have been in
B. has gone to ,has been to , has been in
C. have been in, has been to ,have gone to
D have gone to, have been in , has been to
经皮肝穿刺的禁忌征是肝包虫病。
