问题
填空题
制氢装置开工前应进行系统置换，并进行含氧量分析，含氧量（）为合格。
答案
参考答案：
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制氢装置开工前应进行系统置换，并进行含氧量分析，含氧量（）为合格。
参考答案：
＜0.5%
| 补全对话：选出恰当的句子完成对话。 | |
| A: Can I help you, sir? B: Yes, 1 A: You can go to the centre Hall. There's a store there. B: Thanks. Your English is quite good. A: 2 By the way, are you working here in Beijing? B: No, I am not. I've come for the Olympics. A: Oh, So you are an athlete (运动员). Welcome to Beijing. Which sport… B: Oh, no, no. I'm not athlete. I'm just a football fan. A: Me too! 3 B: Two weeks. I've visited some places of interest. A: What do you think of Beijing? B: 4 Green ground, blue sky and ….Oh, I forgot. My friend is waiting for me there. I must go. Goodbye. A: 5 Have a nice day.
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