Analysis of test questions: This question examines students' memory ability of the earliest rice planting areas. According to what they know, China is the first country to grow rice and millet in the world. In ancient farming life, Banpo clan and Hemudu clan were the representatives of the Yellow River basin and the Yangtze River basin. Planting rice in the south and millet in the north is the so-called analysis topic of "planting rice in the south and millet in the north" A, B and C are all planted in the north and belong to the Yellow River basin.

Comments: This question is less difficult. Examining students' memory ability of historical issues, China is the first country to grow rice and millet in the world, which occupies an important position in the agricultural history of China. These are the basic knowledge in the textbook, and students can answer according to the textbook knowledge, which is a sub-topic.