A、rather
B、quite
C、very
D、fairly
第1题:
第2题:
– David, you've been losing your temper over nothing lately.– ( ).
A. I haven’t been getting much sleep either
B. You’d better not push yourself too hard, or you’ll get sick
C. I’m sorry. I shouldn’t have blown up like that
D. You’d better do exercises regularly
第3题:
根据米曼氏方程改写成双倒数方程作图,纵轴表示
A.[S]
B.V
C.1/I-S]
D.1/V
E.KM
6.D。本题考查米曼氏方程式的双倒数作图,纵轴表示1/V,横轴表示1/[S]。
第4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5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6题:
The difference between “gentleman-in-waiting” and “journeyman” is that _____ .
[A] education trained gentleman-in-waiting to climb higher ladders
[B] journeyman was ready to take whatever was given to him
[C] gentleman-in-waiting belonged to a fixed and high social class
[D] journeyman could do practically nothing without education
本题考查了具体的细节。解题的关键在于考生对文中关于两类人的论述的把握。文章第一段末句提到,教育成了培训,学生也不再是等在那里的绅士,而是要提升自己经济地位的熟练学徒。由此可知,“学徒”与“绅士”的不同就是,绅士不用将教育当成工具去努力争取社会地位,因此可以推测出绅士们属于较高的社会阶层。[C]为正确选项。文中提到教育训练学徒们而非绅士爬上更高的阶梯,所以[A]项错误,[B]项和[D]项在文中没有相关论述。