题目内容

若一个无向图有100条边，则其顶点总数最少为个。

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n个顶点的连通无向图至少有条边，至多有条边。

[音频]Dialogue 1(S = Seller C = Customer)S: Good morning. ______?C: Good morning. Would you show me some typical Chinese souvenirs? I’d like to buy a gift for my wife.S: We’ve got plenty of silk scarves and silk dresses for you to choose from.C: The dress is very nice. _ is it?S: Fifty-five US dollars.C: It’s a little more than I expected. Could you give me a ___?S: I’d like to, but I’m afraid I can’t. You see, it’s already 5% off the regular price.C: Then I’m afraidI can’t _ it.S: Well, let me ask the manager if it’s all right… I’m sorry to have kept you waiting. The best we can do is to _____ you a 10% discount.C: OK. I’ll takeit.

[音频]Dialogue 2(R = Receptionist M = Michael Han)R: Good morning! Welcome to Holiday Hotel. What can I do for you?M: I have a ________ with you.R: May I have your name, please?M: Michael Han.R: Let me check. Yes, there it is. A double room for one night. Mr. Han, may I have a _ at your passport, please?M: OK, here you are.R: Would you please _ the registration form?M: All right. What’s the rate for one person per night?R: 59 .M: Do you accept traveler’s checks?R: Sure. Here is the key card to room 3316. The bell-man will show you the way.M: Thanks. I will be leaving tomorrow. When shall I ____ out?R: Any time before 11:00 a.m.M: All right. I’ll remember that.

气液两相平衡关系将取决于以下两种情况:(1) 若 pe〉p 或 C 〉Ce则属于过程(2) 若 p 〉pe 或 Ce〉C 则属于过程