Question 1:D
Question 2:B
Question 3: D.
1 Question: This question examines the interpretation ability of geographical charts. According
Question 1:D
Question 2:B
Question 3: D.
1 Question: This question examines the interpretation ability of geographical charts. According to the chart, cotton can be distinguished from other crops by using four bands. According to the meaning of the question: the fourth band is near infrared band. So choose option d in this question.
Question 2: According to the meaning of the question, June and September are the best identification periods, and the cotton reflectivity obviously drops from 0.6 to 0.4 at the full flowering stage; Southern Xinjiang is an important cotton producing area in China. The emissivity of cotton may increase with the increase of plants and leaves. So this question chooses option B.
Question 3: This question examines the application of geographic information technology. The application fields of geographic information technology mainly include: the application of remote sensing (RS) in resource investigation, environment and disaster monitoring (which can estimate crop yield and contribute to disaster prevention and reduction). So choose option d in this question.