— Where is my pencil?

— ___________________[ ]

A. It's yellow.

B. It's on the floor.

C. It's so long.

计算题：某加氢装置新氢量是5000m³/h，新氢纯度为90%，循环氢量是20000m³/h，循环氢纯度为88%，处理量为80m³/h，计算出氢油比是多少。