Xiaoyan: I`ve got my fitness programme from the gym for this month,Mary.
Mary: _____1_____class do you have tomorrow , Xiaoyan?
Xiaoyan; Tomorrow-Tuesday-I haven`t got a class. I do gym.
Mary: __2___ do you do gym with?
Xiaoyan: Nobody, I do two gym sessions on my own a week.
Mary: So, ___3____ are your classes?
Xiaoyan: This month, I do aerobics on Saturdays and Tai Chi on Mondays.
Mary: And_____4____do you do next month ?
Xiaoyan: I do three gym sessions, but I don`t do Tai Chi-the class is cancelled.
Mary: _____5____isn't there a class
Xiaoyan: The trainer is on holiday. But it starts again the month after next. So, the month after next, I do two gym sessions again and I do Tai Chi.
Mary: Well. Good luck! Enjoy yourself!
第1题:
-- Hello, Xiaoyan. How Was the party?
--- ____
A. I’m fine, thank you
B. It was Friday
C. Hi, Jack. We had a great time
第2题:
I've _____ these lines again and again but I still keep forgetting them.
A. gone off
B. gone about
C. gone over
D. gone through
第3题:
B 宽度优先(种子染色法)
5.关键路径
几个定义: 顶点1为源点,n为汇点。
a. 顶点事件最早发生时间Ve[j], Ve [j] = max{ Ve [j] + w[I,j] },其中Ve (1) = 0;
b. 顶点事件最晚发生时间 Vl[j], Vl [j] = min{ Vl[j] – w[I,j] },其中 Vl(n) = Ve(n);
c. 边活动最早开始时间 Ee[I], 若边I由<j,k>表示,则Ee[I] = Ve[j];
d. 边活动最晚开始时间 El[I], 若边I由<j,k>表示,则El[I] = Vl[k] – w[j,k];
若 Ee[j] = El[j] ,则活动j为关键活动,由关键活动组成的路径为关键路径。
求解方法:
a. 从源点起topsort,判断是否有回路并计算Ve;
第4题:
Xiaoyan:So, I' d like to come and see the flat.
Franca: Yes, when is convenient? How about during the day? I usually work in the
evening.
Xiaoyan; Well,I work during the day, but perhaps in the afternoon?
Franca:Well, why don't you come at about 5 o'clock?
Xiaoyan:That's a good idea.
Franca; Are you free on Thursday?
Xiaoyan: No, I'm afraid I'm not. We always have a meeting on Thursday. What about
Wednesday?
Franca:No, I' m sorry. I' m busy on Wednesday. I’m in Cambridge. Are you free on
Friday?
Xaaoyan:Yes,Friday is fine.
Franca: Okay. See you on Friday at 5 o'clock at the flat.
Xiaoyan;Thanks very much. Goodbye.
Franca:Goodbye.
1. Franca usually works during the day.
A. Right
B. Wrong
2. It is convenient for both of them to meet in the afternoon.
A. Right
B. Wrong
3.Xiaoyan is free on Wednesday.
A. Right
B. Wrong
4. Franca is not free on Wednesday because he has a meeting.
A. Right
B. Wrong
5. They are going to meet on Friday at the flat.
A. Right
B. Wrong
第5题:
A. tool
B. technique
C. book
D. programme