_____ Lily and Lucy want to download music? [ ]

A. Do

B. Does

C. Are

D. Is

现浇钢筋混凝土框架结构中竖向钢筋的连接，宜采用（）。

A.闪光对焊

B.电弧焊

C.电阻点焊

D.电渣压力焊