A:①②③
B:①②④
C:①③④
D:②③④
——Why do you like the movie?
——_________ it's very exciting.
—I think it was not good.It was a(n) performance.
读“美国本土农业带分布图”,完成问题. 乙、丙两农业带分别是( )
在下列物质中:①HCl、②N2、③NH3、④Na2O2、⑤H2O2、⑥NH4Cl、⑦NaOH、⑧Ar、⑨CO2、⑩C2H4