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问题 填空题

在近几十年软件发展的过程中，始终存在着______的趋向。

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补全对话，情景问答
情景交际：根据对话内容，从方框内选择合适的句子补全对话。(有两项多余)
A. How can I get there?
B. How much does it cost?
C. When are we going there?
D. It's the right time to go there now.
E. Why not call a taxi to go there with your friends?
F. Our sightseeing bus will take you around the city.
G. Could you introduce me a nice place for vacation?
M: Good morning. Can I help you, madam?
W: Yes.   1   
M: OK. Qingdao is a nice place to visit.   2   The weather is neither hot nor cold.
W: Sounds good.  3   
M: You can get there by train.
W: Shall I visit places of interest by bus in Qingdao?
M: Sure.  4   
W: Really perfect.  5   
M: 580 yuan each person. It includes hotel and meals.
W: Well, it's nice. I'd like to book (预定) the tour for two.
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问答题 简答题

光纤差动保护的基本组成部分是哪些？
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