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听力原文:M: Hello, darling. Did you have a good day? W: Not bad. The usual sort of thing, meetings, phone calls, letters, you know. M: Did you see anybody interesting? W: Well, Chris came into the office this morning. We had a long talk. M: Oh, yes? What about? W: Oh, this and that things, you know. M: I see. W: And then Janet turned up. As usual, just when I was trying to finish some work. M: So what did you do? W: Had lunch with her. M: Where did you go? Somewhere nice? W: No, just the pub round the corner. A pie and a pint. Then in the afternoon there was a meeting and it went on for hours. M: Sounds like a boring day. Did anything interesting happen? W: Don't think so, not really. Oh, yes, one thing. Something rather strange. M: What? W: Well, it was this evening. I was getting ready to come home, and the phone rang. So I picked it up. And there was this man. M: Who? W: Well, I don't know. He wouldn't say who he was. But he asked me to have lunch with him tomorrow. M: What? W: Yes. He said he wanted to talk to me about something very important. M: So what did you say? W: Well, I said yes, of course. How was your day? (20)
A.
Colleagues.
B.
Husband and Wife.
C.
Friends.
D.
Roommates.
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【判断题】海湾战争爆发于 1991年1月17日凌晨,这是信息化战争的源起。
A.
正确
B.
错误
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A.
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A.
一般事故
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责任事故
C.
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A.
并且
B.
或者
C.
不含
D.
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【判断题】单位冲激函数δ(t)是单位阶跃函数ɛ(t)的积分。
A.
正确
B.
错误
【判断题】两个单位冲激函数的卷积积分是单位阶跃函数。
A.
正确
B.
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【判断题】单位阶跃函数的积分是单位冲激函数。
A.
正确
B.
错误
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