A:Cl2、NaCl
B:NH4Cl、HNO3
C:MnO2、K2MnO4
D:P2O5、Ca3(PO4)2
如图所示是某电源的路端电压与电流的关系图象,下面正确的是( )
Look, there is ________ onion in the kitchen. We can cook it for dinner.