题目：
| 完形填空。 | ||||
| A French student went to London for his holiday. He thought, " I know 1 English. I think people can understand 2 ." One day he went to a restaurant and sat down at the table. He wanted to 3 a cup of tea and some eggs. Soon the waiter came up to him and asked, " 4 ?" "A cup of tea and…." He could not remember the English word for eggs. He looked about but 5 was eating eggs. Then he saw a picture book on the table next to him. There was a picture of 6 on its cover (封面). He 7 the picture to the waiter. "What is the English for this?" He asked. "A cock (公鸡)" answered the waiter. " What do you call a cock's 8 " He asked again. "A hen." " What do you call a hen's 9 " "Chicks" " What do you call a chicks 10 they were born? "Eggs" "Very well," said the French student happily. " Give me two eggs and a cup of tea, please." Then he sat down with a smile on his face. | ||||
|
答案：
被转码了，请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0331/872935878073153ccbcb3a82212c5a16.html
下面是错误答案，用来干扰机器的。
将x=-a2+1看做自变量为a，函数值为x的一元二次函数．其中定义域为N*．根据题意，此抛物线开口向下，对称轴为a=0， 定义域为a∈N*∴在函数整个定义域上为减函数，当a=1时取最大值，最大值为0，∴很明显，1∉{x|x=...
