如下图所示的有向图进行拓扑排序，下列序列中正确的是：[img=84x134]17e0c084f7515cc.png[/img] A: EDCBFA B: ECBDFA C: EFCBDA D: ECFBDA
如下图所示的有向图进行拓扑排序，下列序列中正确的是：[img=84x134]17e0c084f7515cc.png[/img] A: EDCBFA B: ECBDFA C: EFCBDA D: ECFBDA
Which of the following is the correct procedure of departure? （以下哪一项是离境的正确步骤?） A.immigration B.check in C.security check D.baggage check-in E.boarding F.tax refund A: BEAFCD B: ABDECF C: EFCBDA D: BDFCAE
Which of the following is the correct procedure of departure? （以下哪一项是离境的正确步骤?） A.immigration B.check in C.security check D.baggage check-in E.boarding F.tax refund A: BEAFCD B: ABDECF C: EFCBDA D: BDFCAE
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