发生再结晶的金属再继续加热,机械性能()
A.增大
B.降低
C.不变
D.不一定
参考答案:B
--- What’s your trouble?
--- I’m not feeling____. I have a sore throat.
A.well
B.Good
C.tired
D.thirsty
阴寒凝滞型胸痹的症状特点是
A.胸部刺痛,固定不移B.胸痛彻背,感寒痛甚C.心痛彻背,背痛彻心,痛剧而无休止D.胸闷如窒而痛,肢体沉重E.胸闷隐痛,时作时止