Every autumn, before and after the "cold dew" solar term, it is the key period for late rice to attract flowers in the south. At this time, if you are injured by low temperature, it will cause empty s

Every autumn, before and after the "cold dew" solar term, it is the key period for late rice to attract flowers in the south. At this time, if you are injured by low temperature, it will cause empty shells and shriveled grains, resulting in

Question 1:A

Question 2: A.

Test analysis:

This topic provides the distribution pattern of late rice production and disaster prevention measures in production, and investigates the restrictive factors of late rice production, the temperature situation in Yunnan-Guizhou area and the regulation effect of water on temperature.

Question 1: According to the legend and distribution map of late rice field, late rice is mainly distributed in the provinces with lower latitude in southern China. As we all know, the growth habit of rice likes warm and humid, so it is inferred that the distribution of late rice is closely related to heat conditions. Yunnan-Guizhou region has high altitude, insufficient heat and no late rice distribution. Item a is correct.

Question 2: The topic of the group began to mention "low temperature hazard" and "cold dew wind". In this topic, "in order to actively defend against cold dew wind disaster" and "taking measures of watering deep water or spraying water at night" are not only to prevent the harm of low temperature, so it can be inferred that the purpose of the measures is to keep warm, and item A is correct. In addition, due to the large specific heat capacity of water and small temperature difference change, it can play a role in heat preservation; Combined with water vapor evaporation, the content of water vapor in the air can be increased, and water vapor can strongly absorb long-wave infrared radiation on the ground, thus achieving the effect of ground insulation.

1, influencing factors of late rice yield distribution. 2. The influence of topography on temperature in Yunnan-Guizhou area. 2. The purpose of deep-water irrigation or water spraying at night.

Comments:

1 The ability of picture analysis was investigated, and the heat factors affecting late rice production were inferred from the legend distribution and pictures, which showed that Yunnan-Guizhou region had higher terrain and less heat. Question 2 embodies the application of geographical principles in production.