题目内容

[音频]Dialogue 2(K = Katia A = Alex)A: Hi, Katia, how are you?K: I’m doing good, and you Alex?A: I’m doing good. Thank you. I have a question for you. Are you on Facebook?K: Yes, I’m on Facebook. But I really do not check it very often.A: OK. How often do you check usually?K Em… I actually try not to check it very often. It’s been taken a lot of my time. So right now I check it about… I try _________________ during the weekends.A: OK. I used to be on Facebook a lot before. But then I realize that I was losing ___________ on it, and I kind of decide to close my wall. But I don’t know if that’s the right thing, because sometimes I feel that I need to communicate stuff with my friends.K: It really has become an ____________, hasn’t it? You can get lost from what is actually happening around you and live in a ____________ world. I believe that it should be handled differently han it has up to now so maybe you’re doing good by closing or, you know, _________________ at least.A: Yeah.K: But how much, that you might have to consider.

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喷混凝土终凝后1~2h起即应开始洒水养护。养护期不得少于()?

A. 3d
B. 7d
C. 5d
D. 14d

隧道初期支护,喷射混凝土时,喷嘴角度一般应()?

A. 垂直岩面
B. 倾斜岩面
C. 紧贴岩面

隧道初期支护一次喷射厚度:拱部为(),侧壁为()?

A. 60~100mm
B. 60~80mm
C. 80~150mm
D. 80~100mm

喷射混凝土时,喷嘴与受喷岩面之间的距离一般为()?

A. 0.8~1.5m
B. 0.2~1.0m
C. 0.6~1.5m
D. 0.8~1.0m

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