问题
填空题
观察下列有序数对：（3，-1）（-5，
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答案
观察后发现第n个有序数对可以表示为[（-1）n+1•（2n+1），（-1）n•
]，1 n
∴第100个有序数对是（-201，
）．故答案填（-201，1 100
）．1 100
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观察下列有序数对：（3，-1）（-5，
|
观察后发现第n个有序数对可以表示为[（-1）n+1•（2n+1），（-1）n•
]，1 n
∴第100个有序数对是（-201，
）．故答案填（-201，1 100
）．1 100
It was the last lesson before holidays. The students very happy. Their English teacher was very happy, .The teacher played nice games with them. He sang some nice songs, and then he went to the blackboard and wrote “SMILES” it.“This is one of the words in English”,he said to the class. The class laughed, and then one girl and said,“Why is it one of the longest words in English?”The teacher said for a while. Then he smiled and said,“Because there is a mile between the letter and the last.”
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