Remote sensing identification of cotton is the key to estimate cotton planting area. The following figure shows the spectral information of cotton and other crops in a certain area of China on differe

Question 1:D

Question 2:B

Test analysis:

Question 1: According to the legend, the reflectance of cotton in the visible light band (blue band, green band and red band respectively) is close to that of the other two, so it can't be distinguished, so A, B and C are all wrong, and the fourth band is near infrared band, especially in September, which is clearly distinguished. The correct answer is D.

Question 2: As can be seen from the figure, the reflectivity of cotton in filling stage 3 (red belt) is higher than that in bud stage, so A is wrong, and the reflectivity of cotton in blue belt, green belt and red belt is obviously lower than that in bud stage, so B is right. In September, the reflection of tomatoes on the green band is slightly higher than that in June, so C is wrong. In June, the reflection of corn on the red band is lower than that on the green band, so D is wrong. The correct answer is B.