贺州市矿产资源丰富,尤其是以锡、钨的储量最丰.如图是锡在元素周期表中的信息,下列有关锡的说法错误的是( )
用____检测蛋白质,发生紫色反应.用____检测维生素C,发生褪色反应.
— Good morning. Can I help you?— I'd like to have this package .