A:Fe3+、K+、Cl-、MnO4-
B:Ag+、Na+、NO3-、Cl-
C:Zn2+、Al3+、SO42-、Cl-
D:Ba2+、NH4+、Cl-、HCO3-
______ is the bank from here? It's about 3 kilometers away.
Eighteen-four=____
读如图漫画“小草的哀求”,漫画所反映的情况可能导致的环境问题主要是( )