Here must be an even number ( ) in any graph.
A: Node with even degrees
B: The node of the entry degree is odd.
C: Nodes with odd degrees
D: The node of the outing is an odd number.
A: Node with even degrees
B: The node of the entry degree is odd.
C: Nodes with odd degrees
D: The node of the outing is an odd number.
举一反三
- The number of elements of order 2 in even order groups must be odd
- The even number is yang while the odd number is yin.
- According to the ancient book Yi Jing, number “9” is ______. A: odd number B: even number C: yang number D: yin number
- It sounds ______. Many children of his age don’t even know if a number is odd or even.
- In China, after a baby was born, it is a common custom for their parents to send _________ to their close family and friends with the even number for a girl and the odd number for a boy.