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【单选题】
中国茶道精神的核心是 。A.
和
B.
清
C.
敬
D.
怡
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反馈参考答案：
举一反三
【单选题】If you are a‘lifer’．
A.
you take less time to make it to the top．
B.
you have a long list of previous jobs．
C.
you tend to move less far up in the company．
D.
you keep changing your job all your life．
【单选题】In the US there is a long waiting list for orgasm because ______.
A.
there is a shortage of actual organs
B.
only a few people become organ donors
C.
doctors have set a limit to the number of organ recipients
D.
transplant surgery is still experimental
【单选题】You probably have a long mental list of moments and facts you wish you could remember—but actually you cannot. The good news,【B1】______, is that while such memories may be currently【B2】______, they ar...
A.
although
B.
rather
C.
though
D.
therefore
【简答题】在一个具有n个顶点的有向图中，若所有顶点的出度数之和为s，则所有顶点的入度数之和为 。
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