Sanjiang Plain has the largest swamp wetland in China and is known as the "Great Northern Wilderness". famous book ...

Question 1D

Question 2C

Query 3B

Answer analysis test analysis:

The combination option of 1 can be combined with the exclusion method. Wetlands can absorb and adsorb some toxic and harmful substances in water, but they can't "cover everything". Absorbing ultraviolet rays is the main function of ozone. Wetlands have a vast water area, which can regulate climate, conserve water and store flood disasters; Moreover, wetlands are rich in animal and plant resources, so they can maintain biodiversity.

Question 2: At present, the destruction of wetlands in Sanjiang Plain in China is mainly due to long-term reclamation, which leads to the continuous reduction of wetland area.

Question 3: Wetlands have powerful ecological and environmental functions, so the purpose of stopping reclamation of wetlands in Sanjiang Plain is to protect wetlands and improve the local ecological environment.

Test center: this topic examines the regional ecological environment problems and the sustainable development and protection of wetlands in China.

Comments: This question is not difficult. Students only need to master the main ecological and environmental functions of wetlands and analyze the reasons for the decrease of wetlands with materials. For this kind of questions, students should strengthen the implementation of the basic knowledge of textbooks.