问题
单项选择题
钢材按（）划分为沸腾钢、半镇静钢及镇静钢
A.化学成分
B.冶炼炉型
C.用途
D.脱氧程度
E.质量
答案
参考答案：D
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钢材按（）划分为沸腾钢、半镇静钢及镇静钢
A.化学成分
B.冶炼炉型
C.用途
D.脱氧程度
E.质量
参考答案：D
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| Yesterday was Saturday. Mr King 1 his family to the People's Park in the 2 . They got up early and had 3 quickly. After that they went to the park 4 their car. It was nine o'clock when they got there. There were many 5 in the park. Lily 6 the hill in the middle of the park. Lucy flew a kite 7 some other children. Mr King and his wife were tired after five days' 8 . They sat under a tree and had a 9 . The King family had a 10 time there. | ||||
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