单项选择题

A.水:≥0.4MPa,蒸汽:≥0.8MPa,压缩空气:≥0.4MPa
B.水:≥0.3MPa,蒸汽:≥0.8MPa,压缩空气:≥0.4MPa
C.水:≥0.4MPa,蒸汽:≥0.6MPa,压缩空气:≥0.4MPa
D.水:≥0.4MPa,蒸汽:≥0.8MPa,压缩空气:≥0.2MPa