问题
填空题
20钢属（）钢，其含碳量为（）；45钢属（）钢，其含碳量为（）；T8钢属（）钢，其含碳量为（）。
答案
参考答案：低碳；0.2％；中碳；0.45％；高碳；0.8％
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20钢属（）钢，其含碳量为（）；45钢属（）钢，其含碳量为（）；T8钢属（）钢，其含碳量为（）。
参考答案：低碳；0.2％；中碳；0.45％；高碳；0.8％
| 交际运用。根据对话内容及方框中所给的句子补全对话。其中有一项是多余的。 | |
| A: Have you ever been late for school? B: Hardly ever. only once or twice every term. 1 A: Have you ever overslept? B: Yes, I have. A: 2 B: I would ask my father to drive me to school. He has a car. A: What if your father had already left home for work? B: 3 A: Have you ever left your keys in the house? B: Sometimes. A: 4 B: I'll have to call my parents and ask them to come back home and open the door for me. A: You should be serious about everything. B: 5 A: It's my pleasure.
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