巷道维修时，两组作业人员相距不得超过（）。_爱下问搜题

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问题填空题

巷道维修时，两组作业人员相距不得超过（）。

答案

参考答案：100m

补全对话，情景问答

从方框中选择最佳选项完成对话，有两项多余。

A. That's good idea.
B. I'm calling to thank you for your present.
C. Yes, very much.
D. Well, I saw many old things on show.
E. I called you yesterday, but you were not in.
F. How was your trip?
G. When did you go there?

A: Hello, Jim. This is Ann speaking.
B: Hi, Ann.
A: 1____
B: Do you like it?
A: 2____ It's a beautiful sweater. I really like the color.
B: I think the blue is just the right color for you. By the way, you looked wonderful at the party.
A: Thank you. I really enjoyed it. 3____
B: Oh, I'm sorry. I went to the Science Museum.
A: What did you see?
B: 4____
A: Wow! Are there any new things?
B: Yes, many more! Why not go there and have a look?
A: But I don't know the way to the museum.
B: Don't worry. I'll go with you.
A: Great! Thanks.

判断题

根据《环境甲基汞的测定气相色谱法》（GB／T17132—1997），测定甲基汞的水样在低温（4℃）、酸性（pH=3）条件下，可短时间保存，但不能超过12h。