Not only my friends but also I __________ interested in football and Messi is our favorite star.
A:be
B:am
C:is
D:are
黄铜矿(主要万分CuFeS2)经初步处理后,所得溶液甲中的溶质为Fe2(SO4)3、CuSO4及H2SO4.某同学通过废铁屑与溶液甲反应,制取补血剂原料碳酸亚铁并回收铜.主要步骤如图所示:
下列各项中,与家鸽飞行生活相适应无关的是( )