题干
—Tell me something about your adventure in the rainforest, please.
— We lost our way in the forest and ___ made matters worse was ___ night began to fall.
A：what; that
B：it; that
C：it; because
D：what; because
答案(点此获取答案解析）
A
为石墨电极；
为铁电极；
为铝电极（已除去表面氧化膜）；
为多孔石墨电极，烧杯中是足量饱和食盐水（滴有酚酞），连好导线后，电流计指针发生明显偏转。下列判断正确的是