过烧的钢可以采用正火或退火的办法来补救,使其恢复原样,再重新加热轧制。
参考答案:错
男性,68岁,因呕血、黑便半日急诊入院。查体:上腹部可扪及包块,X线钡餐检查胃内型呈半圆形充盈缺损,边缘整齐,中央可见脐样的溃疡龛影。
该患者最可能的疾病诊断是()
A.胃癌
B.胃神经纤维瘤
C.胃息肉癌变
D.胃溃疡
E.胃平滑肌肉瘤
We are now enjoying the cool air in the room.________,the farmers are harvesting crops in the hot sun.[ ]
A. Therefore
B. Besides
C. As a result
D. In the meantime