After the State Environmental Protection Administration of China announced the water pollution of Songhua River, the expert advisory group in charge of the water pollution treatment of Songhua River proposed that the sewage group should use _______ powder to absorb the water pollutants later.
选项:
A:Bamboo charcoal;
B:Activated carbon;
C:Sponge;
D:Silica gel
发布时间:2024-06-09 00:38:47