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【单选题】
在一个图中,所有顶点的度数之和等于图的的( )倍。在一个图中,所有顶点的度数之和等于图的的( )倍。A.
1/2
B.
1
C.
2
D.
4
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【简答题】When you are curious about something, and want to know more about it, you can use the way of asking questions. Asking questio ns i s the first step to make discoveries and find interesting answers. Th...
【单选题】The teacher wants the children to feel ________about asking questions when they don't understand. [ ]
A.
certain
B.
concerned
C.
sure
D.
confident
【简答题】When you are curious about something and want to know more about it, you can use the way of asking questions. Asking questions is the first step to make discoveries and find interesting answers. The f...
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