问题
单项选择题
()对优质碳素结构钢锻件,应采用的热处理方法。
A.空冷后退火
B.正火或正回火
C.调质
D.淬火
答案
参考答案:B
()对优质碳素结构钢锻件,应采用的热处理方法。
A.空冷后退火
B.正火或正回火
C.调质
D.淬火
参考答案:B
书面表达。 | ||||||
Life is just like a mirror, you smile at it, and it smiles at you, too. 请你以“Learn to Smile”为题,根据下表所列的要点写一篇100词左右的文章(文章开头已给出)。
2. 短文必须包括所有内容要点,不要逐字翻译,可适当发挥,使短文连贯通顺。 Learn to Smile I remember a song by Westl ife, the first sentence of it is "Just a smile and the rain is gone." Do you like smiling? I think you should learn to smile . __________________________________________________________________________ ______________________________________________________________________________ ______________________________________________________________________________ |