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【多选题】
下列说法正确的是？A.
具有经过图中每条边一次当且仅当一次的回路的图叫做。
B.
无具有一条欧拉路，当且仅当图是连通的，且有两个或零个奇数度顶点。
C.
无有一条欧拉回路当且仅当图是连通的，并且所有顶点度数为偶数。
D.
一个有向图具有单向，当且仅当图是连通的，而且除两个顶点外，每个顶点的入度等于出度。
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举一反三
【单选题】What happened to the university?
A.
Many computers were broken.
B.
Dozens of records of applicants were hacked into.
C.
A number of people could not be identified.
D.
The new computer software was stolen.
【单选题】What impressed me in Greece was that the oceans _______ the islands were deep blue and many cities lay on the bay.
A.
surrounding
B.
being surrounded
C.
surrounded
D.
surround
【简答题】阅读理解。 What is American food? At first you might think the answer is as easy as pie. To many people, American food means hamburgers, hot dogs, fried chicken and pizza. If you have a 'sweet tooth', you ...
【单选题】What he said at the meeting is really _____, so many people were _____. [ ]
A.
confused; confusing
B.
confusing; confused
C.
confused; confused
D.
confusing; confusing
【简答题】8月1日是星期一，那么8月29日是星期几？
【简答题】2008年 8 月 29日， 我国______通过，在 2009年 1月 1 日起实施。
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