— What were you doing while he _____?

—  I _____ in front of the building. [ ]

A. was skating; stood

B. was skating; was standing

C. skated; stood

D. skated; was standing

腹泻病，轻度失水病儿拒食口服补液盐，需进行静脉补液，开始24h，液量为每公斤

A．50～70ml

B．80ml

C．120ml

D．180ml

E．160ml