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举一反三
【单选题】Low-carbon Future：We Can Afford to Go Green Tackling climate change will cost consumers the earth．Those who campaign for a green revolution are out to destroy our western lifestyles．Such are the cries...
A.
Economic recession is widely spread.
B.
Western lifestyles are destroyed.
C.
The cost of a green revolution rises.
D.
The environment is improved.
【单选题】下列有关铁及其化合物的有关说法中正确的是（ ）
A.
赤铁矿的主要成分是Fe3O4
B.
铁与水蒸气在高温下的反应产物为Fe2O3和H2
C.
除去FeCl2溶液中的FeCl3杂质可以向溶液中加入铁粉，然后过滤
D.
Fe3+与KSCN产生血红色沉淀