Question 1:A

Question 2:C

Test analysis:

Question 1: The key word of this question is "analysis". Geographic Information System (GIS) is a technical system that collects, stores, manages, calculates, analyzes, displays and describes the relevant geographic distribution data of the whole or part of the earth's surface space. The biggest difference between GIS and other information systems is the storage, management and analysis of spatial information, which changes in real time. In order to show the dynamic change of Poyang Lake water surface area and predict its changing trend, it is necessary to use geographic information system. GPS is a global positioning system, which can locate and navigate in real time around the world. RS refers to non-contact and long-distance detection technology. It is suitable for natural disaster remote sensing, agricultural remote sensing monitoring, water quality monitoring, etc.

Question 2: The key word of this question is "slimming". Poyang Lake wetland is sometimes seriously "slimmed down", and some lake areas have become "prairies". The picture shows the "Caohai" landscape, which should be caused by drought and lack of rain. So choose C.