题目

阅读理解Children start out as natural scientists. Helping them enjoy science can be easy; there's no need for a lot of scientific terms or expensive lab equipment. Firstly, listen to their questions. I once visited a classroom of seven-year-olds to talk about science as a job. The children asked me textbook questions about schooling, salary and whether I liked my job. When I finished answering, we sat in silence. Finally I said, Now that we've finished with your lists, do you have questions of your own about science?A boy raised his hand, Have you ever seen a grasshopper (蚱蜢) eat? When在两个连续整数a和b之间，且，那么a、b的值分别是    ，    ．