A:You must take charge of it.
B:Wait for your punishment.
C:I’d like a refund, please.
D:I won’t agree with that.
在热的稀硫酸中投入铜片,然后通入空气,实验现象为()①无明显现象,因为不发生反应②铜片溶解,溶液变蓝③铜片上有气体④铜片溶解,有SO2生成⑤铜片变黑,有H2放出
①2CO ②2N ③ Cu+2O ④2Na+⑤Mg2+⑥H2O.