题目内容
水泥稳定土类材料自拌和至摊铺完成，不得超过()h。
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《给水排水管道工程施工及验收规范》规定，预制管辅设管道的现场浇筑混凝土基础强度，接口抹带或预制构件现场装配的接缝水泥砂浆强度不应小于()MPa。
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Part B
Directions: You will hear four dialogues or monologues. Before listening to each one, you will have 5 seconds to read each of the questions which accompany it. While listening, answer each question by choosing A, B, C or D. After listening, you will have 10 seconds to check your answer to each question. You will hear each piece ONLY ONCE.
听力原文：M: Congratulations on breaking the records at the recent Olympics, Miss Green!
W: Thank you, Mr Parker.
M: Oh, look at those trophies! You became a swimming star at the age of fifteen, didn't you？
W: Yeah, you're right.
M: Could you tell me something about your plans for the future？
W: To tell you the truth, I'm going to give up swimming from now on.
M: I beg your pardon？
W: I mean I'd rather not swim at all. I'm too old to...
M: Excuse me, if I'm not wrong, you're only twenty now. Is it too old at twenty？
W: Yes, too old for a swimmer. If I swim in an international competition, I'll hardly be able to win.
M: But... er... don't you enjoy swimming？
W: Certainly, and I enjoy visiting other countries, and the Olympics are very exciting. However, I missed more important things. I had to work very hard at swimming. There was training before school, after school, and at weekends. While other girls were growing up, I was swimming, swimming. But life isn't merely swimming, is it？
When did Miss Green become a swimming star？
【28】
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