Looking at the following pictures, the changes from Figure 1 to Figure 3 mainly illustrate &n...

Test analysis: the bone plough in Figure 1 is made of the scapular swollen bone of even-toed hoofed animals, and it is the main production tool of the Hemudu people engaged in rice cultivation, and the stone plough is a kind of stone tool mainly of the Neolithic period, with a thin body The stone plow is mainly a kind of stone tool in the Neolithic period, with a thin and flat body, made of pyroxene stone, which is hard and convenient for plowing. Iron farming tools began to appear in the Spring and Autumn Period, and their use expanded in the Warring States Period. From Figure 1 to Figure 3, we can see that the tools of agricultural production were constantly improved.D is in line with the meaning of the question.

Comment: This question in the form of pictures, visual reflection of the country's ancient tools of production continued to improve, the test of the students' ability to summarize. The development of China's ancient tools of production through several important stages: the beaten stone age - the grinding stone age - the Bronze Age - the Iron Age.

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