What is the function of using four questions in the first sentence of the sound 1? What is the main part of this poem? Summarize the main contents.

1, four questions in succession, using rhetorical devices of parallelism, on the one hand, it shows the author's strong scientific interest and thirst for knowledge, and opens the valve of the author's imagination. On the other hand, it leads our vision to ancient biology, which is thought-provoking and interesting, arouses readers' thinking and interest, increases the potential of language and has a strong sense of rhythm.

2. Section 1 and 2 are the first layer. At first, the imagination and thinking of the author and readers were stimulated by the method of parallelism through continuous questions.

The third, fourth, fifth and sixth verses are the second layer and the main part of the poem. They specially express the content of daydream, and write fossils in a praising tone and anthropomorphic way. The tone is full of praise for the magical power of fossils and sincere admiration for nature. )

The seventh section is the third layer, which gives a positive answer to the second section in a declarative tone, further praising the wonders of fossils and nature.