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【单选题】
设有向无环图G中的有集合E={<1,2>,<2,3>,<3,4>,<1,4>},则下列属于该有向图G的一种拓扑排序序列的是()A.
1,2,3,4
B.
2,3,4,1
C.
1,4,2,3
D.
1,2,4,3
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【单选题】Why does the woman advise the man the sublet? 查看材料
A.
Because it's convenient．
B.
Because the man doesn't need to spend money on furniture．
C.
Because the company can save money in the long run．
D.
Because the company doesn't have to buy furniture for the man．
【简答题】Why does the man know SO much about San Francisco?
【简答题】Why does the man want a one—way ticket to New York?
【单选题】Why does not the man go with the woman?
A.
The man is a little tired．
B.
The man doesn' t like to listen to music．
C.
The man is going to continue studying．
D.
The man is going to make a reservation．
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