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【多选题】
60Si2MnB的含碳量 ,它是 。A.
0.6%
B.
6%
C.
60%
D.
合金工具钢
E.
合金弹簧钢
F.
F．耐热钢
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【单选题】听力原文：M: I was sorry to hear about Bill's being fired. I know he was sick a lot and that he usually got to work late. W: Oh, it wasn't that. Bill made a big error in last month's accounting. Even thoug...
A.
He got angry with his boss.
B.
He was frequently sick and absent from work.
C.
He prepared a financial report incorrectly.
D.
He always got to work late.