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【单选题】
SUS304奥氏体不锈钢 应选择以下哪种焊接材料?A.
A307
B.
ER308
C.
SF308L AB-S308L
D.
A407
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A.
After midnight.
B.
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D.
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【简答题】完形填空。 These days men and women, young and old are 1 the same kind of 2 , and a lot of 3 have long hair (头发). We often can't 4 whether they are boys or girls, men or women. 5 old man often goes to walk...
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