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A: ()? B: I've got a bad cough.
A、What's the matter with you
B、What is it like
C、How was your day yesterday
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The cake she made looks ( ) but it tastes ( ).
A、well/ badB、badly/ wellC、bad/ wellD、bad/ good
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I've _____ these lines again and again but I still keep forgetting them.A. gone offB. gone aboutC. gone overD. gone through
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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;
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下面化合物对亲核试剂的反应性按照由高到低的顺序排列,正确的是?A.I > III > IV> II > VB.IV > II > I > III > VC.V > III > I > II > IVD.I > IV > II >III >VE.III > V > IV > II > I
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