题目

It is sometimes said that the English are polite people. This can make life difficult for foreigners. Suppose a foreign boy asks an English girl to go out with him and she says. If I finish my work, I'll meet you in the cafe at 7 o'clock. Is she saying yes or no to his invitation? In grammatical terms, she is using the conditional structure (假设结构). By using the conditional, speakers of English can avoid giving a yes or no answer to a question. It enables people to be diplomatic(有策略). If the girl doesn't want to go out with the boy, she won't turn up at the place she will let him 已知整数对的序列如下：(1,1),(1,2),(2,1),(1,3),(2,2),(3,1),(1,4),(2,3),(3,2),(4,1),(1,5),(2,4),…则第60个数对是______________