2001.01.....16&34

groundkeeper

16. A variation of collodion pgotography was the tintype, which captured images on a black or dark brown metal plate instead from on glass.

answer is D, but how to correct it ,,,,,求教

34.Acrylic paints are either applied using a knife or diluted and spreading with a paintbrush.

answer is D, but why" applied +using" is correct, 求教again.....